September 27, 2006 $450,000,000 Senior Unsecured Bridge Facility

Exhibit 10.3

EXECUTION COPY

September 27, 2006

$450,000,000

Senior Unsecured Bridge Facility

Commitment Letter

Pilgrim’s Pride Corporation

4845 US Highway 271 North

Pittsburg, TX ###-###-####

Attention: Richard A. Cogdill

Ladies and Gentlemen:

You have advised Lehman Brothers Commercial Bank (“LBCB”) and Lehman Brothers Inc. (“Lehman Brothers”) that Pilgrim’s Pride Corporation, a Delaware corporation (the “Borrower”) intends to acquire all of the capital stock (the “Acquisition”) of Gold Kist Inc., a Delaware corporation (the “Target”). In that connection, you have requested that the Arranger (as defined below) agree to structure, arrange and syndicate a senior unsecured bridge facility in an aggregate amount of up to $450,000,000 (the “Bridge Facility”), the proceeds of which will be used to (i) finance a portion of the Acquisition (based upon a per share price of the Target’s shares of $20.00) and (ii) pay related fees and expenses.

Upon the terms and subject to the conditions set forth or referred to in this commitment letter (the “Commitment Letter”) and in the Summary of Terms and Conditions attached hereto as Exhibit A (the “Term Sheet”), LBCB is pleased to inform you of its commitment to provide 100% of the Bridge Facility, of Lehman Commercial Paper Inc’s (“LCPI”) agreement to act as Administrative Agent and of Lehman Brothers’ agreement to act as sole lead arranger and sole book-runner for the Bridge Facility. For the purposes of this Commitment Letter, (a) “LBCB” shall mean LBCB and/or any affiliate thereof, including Lehman Brothers, as LBCB shall determine to be appropriate to provide the services contemplated herein, (b) the “Initial Lender” shall mean LBCB, and (c) the “Arranger” shall mean Lehman Brothers.

It is agreed that the Arranger will act as the sole book-runner and sole lead arranger for the Bridge Facility, LCPI will act as the sole and exclusive Administrative Agent (acting in such role, the “Administrative Agent”) and the sole and exclusive Syndication Agent (acting in such role, the “Syndication Agent”) for the Bridge Facility. Each of the Arranger, the Administrative Agent and the Syndication Agent will have the rights and authority customarily given to financial institutions in such roles, but will have no duties other than those expressly set forth herein. You agree that no other agents, co-agents, arrangers or book-runners will be appointed, no other titles will be awarded and no compensation (other than that expressly contemplated by the Term Sheet or the Fee Letter referred to below or as previously disclosed to the Arranger) will be paid in connection with the Bridge Facility unless you and we so agree. The Lehman Brothers name shall appear immediately above or immediately to the left of the name of any other agent on the cover of any marketing materials that describe the Bridge Facility.

We intend to syndicate the Bridge Facility to a group of financial institutions (together with LBCB, the “Lenders”) identified by us in consultation with you. The Arranger intends to commence syndication efforts promptly upon the execution of this Commitment Letter, and you agree actively to assist the Arranger in completing a syndication satisfactory to them. Such assistance shall include (a) your using commercially reasonable efforts to ensure that the syndication efforts benefit from your existing lending relationships, (b) direct contact between senior management and advisors of the Borrower and the proposed Lenders, (c) assistance in the preparation of customary marketing materials (collectively, the “Company Materials”) to be used in connection with the syndication of the Bridge Facility and (d) the hosting, with the Initial Lender and the Arranger, of one or more meetings of prospective Lenders and, in connection with any such Lender meeting, your consultation with the Arranger with respect to the presentations to be made at such meeting, and your making available appropriate officers and representatives of the Borrower to rehearse such presentations prior to such meetings, as reasonably requested by the Arranger. You also agree that you will work with the Arranger to procure ratings, at your expense, by each of Moody’s Investors Service, Inc. (“Moody’s”) and Standard & Poor’s Ratings Group (“S&P”). It is understood and agreed that nothing in this Commitment Letter shall require you to consummate the Acquisition, which you may do in your sole and absolute discretion. At the reasonable request of the Arranger, you agree to assist in the preparation of a version of the Company Materials consisting exclusively of information and documentation that is either publicly available or not material with respect to the Borrower, the Target or any of their respective subsidiaries or securities for purposes of United States federal and state securities laws.

The Arranger will, in consultation with you, manage all aspects of the syndication, including decisions as to the selection of institutions to be approached and when they will be approached, when their commitments will be accepted, which institutions will participate, the allocations of the commitments among the Lenders and the amount and distribution of fees among the Lenders. To assist the Arranger in its syndication efforts, you agree promptly to prepare and provide to the Arranger all information with respect to the Borrower, the Target (to the extent reasonably available), the Acquisition and the other transactions contemplated hereby, including all financial information and projections (the “Projections”), as we may reasonably request in connection with the arrangement and syndication of the Bridge Facility. You hereby represent and covenant that, with respect to the Borrower, the Target (to your knowledge), the Acquisition and the other transactions contemplated hereby, (a) all information (other than the Projections and general economic information) that has been or will be made available to the Arranger, the Initial Lender and/ or any proposed Lenders by you or any of your representatives in connection with the transactions contemplated hereby (the “Information”), when taken as a whole, is or will be, when furnished, complete and correct in all material respects and does not or will not, when furnished, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements contained therein not materially misleading in light of the circumstances under which such statements are made and (b) the Projections that have been or will be made available to the Arranger, the Initial Lender and/or any proposed Lender by you or any of your representatives in connection with the transactions contemplated hereby have been or will be prepared in good faith based upon assumptions believed by you to be reasonable at the time made, it being understood that actual results may vary materially from the Projections. If, at any time from the date hereof until the execution and delivery of the definitive financing documents, you have become aware that any of the representations and warranties above would be incorrect if the Information or Projections were being furnished, and such representations and warranties were being made, at such time, then you agree to promptly supplement the Information and Projections to the extent such information is reasonably available to you so that the representations and warranties contained in this paragraph remain correct under those circumstances. You understand that in arranging and syndicating the Bridge Facility we may use and rely on the Information and Projections without independent verification thereof. Notwithstanding the foregoing, it is agreed that copies of annual reports, proxy or financial statements or other reports or communications sent to the stockholders of the Target, and copies of all annual, regular,

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periodic and special reports and registration statements which in each case the Borrower or the Target has filed with the Securities and Exchange Commission (the “SEC”), or with any national securities exchange shall for purposes of this Commitment Letter, be deemed to have been made available to the Arranger by you. In addition, the Arranger and the Initial Lender acknowledge that, in the event the Acquisition is structured as a tender offer, all information of the Target was or will be obtained from the Target’s filings with the SEC (the “Target’s Public Information”) and the Borrower shall not make any representation or covenant in respect of such information; other than, that to the Borrower’s knowledge, the Target’s Public Information does not contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements contained therein not materially misleading in light of the circumstances under which such statements were made.

As consideration for the Initial Lender’s commitment hereunder and the Arranger’s agreement to perform the services described herein, you agree to pay to the Initial Lender and/or the Arranger (as applicable) the fees set forth in the Fee Letter dated the date hereof and delivered herewith (the “Fee Letter”), in the amounts and at the times specified therein.

The commitments and agreements of the Arranger and the Initial Lender described herein are subject to (a) there shall not have occurred or be threatened any event, circumstance, change or effect that, individually or in the aggregate with any other events, circumstances, changes and effects is or may be materially adverse to the business, condition (financial or otherwise) assets, liabilities, capitalization, prospects, operations or results of operations of the Borrower, the Target or any of their respective affiliates or to the industry in which the Borrower and the Target operate (including events relating to occurrences or cases of avian influenza affecting the markets or industry in which the Borrower and the Target operate) that, in our reasonable judgment, is or may be materially adverse to the Borrower or any of its affiliates, or we become aware of any facts that, in our reasonable judgment, have or may have material adverse significance with respect to the value of the Target or any of its affiliates or result or may result in a material diminution of the value of the Target’s shares or the benefits expected to be derived by the Borrower of any of its affiliates as a result of the transactions contemplated by the Acquisition, (b) our not becoming aware after the date hereof of any information or other matter affecting the Target and its subsidiaries that is inconsistent in a material and adverse manner with any such information or other matter disclosed to us prior to the execution of this Commitment Letter, (c) our satisfaction that from the date of this Commitment Letter until 90 days after the Initial Closing Date (as defined in the Term Sheet) (if any), there shall be no competing offering, placement or arrangement of any debt securities or bank financing (other than (i) as contemplated by this Commitment Letter and the Fee Letter, (ii) the Commercial Bank Financing (as defined in the Term Sheet), including any accordion feature thereunder, and (iii) increases of commitments under the Borrower’s existing credit and securitization facilities and for purposes other than to finance the Acquisition) by or on behalf of the Borrower or any affiliate thereof except with the prior written consent of the Arranger (not to be unreasonably withheld or delayed) and other than an issuance of securities issued by the Borrower or any of its affiliates the proceeds of which will be applied in full or in part to finance the Acquisition, (d) the negotiation, execution and delivery of definitive documentation with respect to the Bridge Facility reflecting and consistent with the terms and conditions set forth in the Term Sheet and the Fee Letter and reasonably satisfactory to each of the Initial Lender and their counsel, (e) there being a period of at least 30 days between the commencement of the syndication process and the occurrence of the Initial Closing Date; provided that the Initial Lender shall use its reasonable best efforts to commence its syndication efforts prior to the Initial Closing Date such that the syndication process shall not adversely affect the Borrower’s ability to consummate the Acquisition, including the tender offer for the Target’s securities, (f) your compliance with your covenants and agreements contained herein and the correctness in all material respects of your representations and warranties contained herein both as of the date hereof and as of the Initial Closing Date and the Final Closing Date (if any), (g) the other conditions set forth or referred to in the Term Sheet. Those matters that are not covered by the provisions hereof and of the Term Sheet are subject to the approval and agreement of the Initial Lender and the Borrower.

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You hereby agree to indemnify and hold harmless each of LBCB, LCPI, Lehman Brothers, the other Lenders and each of their respective affiliates and each of their respective officers, directors, partners, trustees, employees, affiliates, shareholders, advisors and agents (each, an “indemnified person”) from and against any and all losses, claims, damages and liabilities to which any such indemnified person may become subject arising out of or in connection with this Commitment Letter, the Bridge Facility, the Term Loans (as defined in the Term Sheet), the Exchange Notes (as defined in the Term Sheet), the use of the proceeds therefrom, the Acquisition, any of the other transactions contemplated by this Commitment Letter, any other transaction related thereto or any claim, litigation, investigation or proceeding relating to any of the foregoing, regardless of whether any indemnified person is a party thereto, and to reimburse each indemnified person upon demand for all legal and other expenses reasonably incurred by it in connection with investigating, preparing to defend or defending, or providing evidence in or preparing to serve or serving as a witness with respect to, any lawsuit, investigation, claim or other proceeding relating to any of the foregoing (including, without limitation, in connection with the enforcement of the indemnification obligations set forth herein); provided, however, that no indemnified person shall be entitled to indemnity hereunder in respect of any loss, claim, damage, liability or expense to the extent that it is found by a final, non-appealable judgment of a court of competent jurisdiction that such loss, claim, damage, liability or expense resulted directly from the gross negligence or willful misconduct of such indemnified person. In no event will any indemnified person be liable on any theory of liability for (i) indirect, special or consequential damages, lost profits or punitive damages as a result of any failure to fund the Bridge Facility contemplated hereby or otherwise in connection with the Bridge Facility or (ii) any damages arising from the use by unauthorized persons of information, projections or other materials sent through electronic, telecommunications or other information transmission systems that are intercepted by such unauthorized persons.

The Borrower further agrees that, without the prior written consent of each of LBCB, LCPI and Lehman Brothers, which consent will not be unreasonably withheld, it will not enter into any settlement of a lawsuit, claim or other proceeding arising out of this Commitment Letter or the transactions contemplated by this Commitment Letter in which an indemnified person is a party unless such settlement includes an explicit and unconditional release from the party bringing such lawsuit, claim or other proceeding of such indemnified person.

The Borrower, LBCB, LCPI and Lehman Brothers agree that if any indemnification or reimbursement sought pursuant to these indemnification provisions is judicially determined to be unavailable for a reason other than the gross negligence or willful misconduct of such indemnified person, then, whether or not LBCB, LCPI or Lehman Brothers is the indemnified person, the Borrower, on the one hand, and LBCB,LCPI and/or Lehman Brothers, as the case may be, on the other hand, shall contribute to the losses, claims, damages, liabilities and expenses for which such indemnification or reimbursement is held unavailable (i) in such proportion as is appropriate to reflect the relative benefits to the Borrower, on the one hand, and LBCB, LCPI and/or Lehman Brothers, as the case may be, on the other hand, in connection with the transactions to which such indemnification or reimbursement relates, or (ii) if the allocation provided by clause (i) above is judicially determined not to be permitted, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) but also the relative faults of the Borrower, on the one hand, and LBCB, LCPI and/or Lehman Brothers, as the case may be, on the other hand, as well as any other equitable considerations; provided, however, that in no event shall the amount to be contributed by LBCB, LCPI and/or Lehman Brothers pursuant to this paragraph exceed the amount of the fees actually received by LBCB, LCPI and/or Lehman Brothers, as the case may be, under this Commitment Letter or the Fee Letter.

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In case any action or proceeding is instituted involving any indemnified person for which indemnification is to be sought hereunder by such indemnified person, then such indemnified person will promptly notify you of the commencement of any action or proceeding; provided, however, that the failure so to notify you will not relieve you from any liability that you may have to such indemnified person pursuant hereto or from any liability that they may have to such indemnified person other than pursuant hereto. Notwithstanding the above, following such notification, you may elect in writing to assume the defense of such action or proceeding, and, upon such election, you will not be liable for any legal costs subsequently incurred by such indemnified person (other than reasonable costs of investigation and providing evidence) in connection therewith, unless (i) you have failed to provide counsel reasonably satisfactory to such Indemnified Person in a timely manner, (ii) counsel provided by the Borrower reasonably determines that its representation of such indemnified person would present it with a conflict of interest or (iii) the indemnified person reasonably determines that there may be legal defenses available to it which are different from or in addition to those available to the Borrower. In connection with any one action or proceeding, you will not be responsible for the fees and expenses of more than one separate law firm (in addition to local counsel) for all indemnified persons.

You acknowledge that Lehman Brothers and its affiliates (the term “Lehman Brothers” being understood to refer hereinafter in this paragraph to include such affiliates, including LBCB and LCPI) may be providing debt financing, equity capital or other services (including financial advisory services) to other companies in respect of which you may have conflicting interests regarding the transactions described herein and otherwise; provided that neither Lehman Brothers nor its affiliates will provide financing or other services (including financial advisory services) or any commitment to provide financing to any other company in connection with any such company’s proposed acquisition of the Target during the period from the date hereof to the latter of (i) the date of the expiration or termination of this Commitment Letter or (ii) the expiration or withdrawal of the Borrower’s tender offer for the Target’s securities. Lehman Brothers will not use confidential information obtained from you by virtue of the transactions contemplated by this Commitment Letter or their other relationships with you in connection with the performance by Lehman Brothers of services for other companies, and Lehman Brothers will not furnish any such information to other companies. You also acknowledge that Lehman Brothers has no obligation to use in connection with the transactions contemplated by this Commitment Letter, or to furnish to you, confidential information obtained from other companies.

This Commitment Letter shall not be assignable by you without the prior written consent of Lehman Brothers, LCPI and LBCB (and any purported assignment without such consent shall be null and void), is intended to be solely for the benefit of the parties hereto and is not intended to confer any benefits upon, or create any rights in favor of, any person other than the parties hereto. This Commitment Letter may not be amended or waived except by an instrument in writing signed by you and Lehman Brothers, LCPI and LBCB. This Commitment Letter may be executed in any number of counterparts, each of which shall be an original, and all of which, when taken together, shall constitute one agreement. Delivery of an executed signature page of this Commitment Letter by facsimile transmission shall be effective as delivery of a manually executed counterpart hereof. This Commitment Letter and the Fee Letter are the only agreements that have been entered into among us with respect to the Bridge Facility and set forth the entire understanding of the parties with respect thereto. This Commitment Letter shall be governed by, and construed in accordance with, the laws of the State of New York.

This Commitment Letter is delivered to you on the understanding that neither this Commitment Letter, the Term Sheet nor the Fee Letter nor any of their terms or substance shall be disclosed, directly or indirectly, to any other person except (a) to your directors, officers, employees, counsel, advisors and agents who are directly involved in the consideration of this matter, (b) to Moody’s and/or S&P in each case on a confidential and “need-to-know” basis and only in connection with the transactions contemplated hereby (in which case, you agree to inform us promptly thereof) or (c) as may be compelled

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in a judicial or administrative proceeding or as otherwise required by law (in which case, to the extent permitted by law, you agree to inform us promptly thereof); provided that the foregoing restrictions shall cease to apply (except in respect of the Fee Letter and its terms and substance) after this Commitment Letter has been accepted by you. In addition, this Commitment Letter is entered into on the understanding and agreement that neither the existence of this Commitment Letter, the Term Sheet nor the Fee Letter nor any of their contents, nor any of the Information or the Projections, shall be disclosed by the Arranger or the Initial Lender or any of their respective affiliates, directly or indirectly, to any other person, except (i) as may be compelled in a judicial or administrative proceeding or as otherwise required by law (in which case we agree, to the extent permitted by law, to inform you promptly thereof), (ii) to the Arranger’s, the Initial Lender’s and their affiliates’ directors, officers, employees, counsel, advisors and agents, in each case on a confidential and “need-to-know” basis and only in connection with the transactions contemplated hereby, (iii) exclusively with respect to the Term Sheet, as reasonably required for the syndication of the Bridge Facility and (iv) as otherwise expressly permitted by the immediately following paragraph. The indemnification and confidentiality provisions contained herein and in the Fee Letter shall remain in full force and effect regardless of whether definitive financing documentation shall be executed and delivered and notwithstanding the termination of this Commitment Letter or the Initial Lender’s commitments hereunder.

The Borrower agrees that Arranger has the right to place advertisements in financial and other newspapers and journals at its own expense describing its services to the Borrower; provided that the Arranger will submit a written copy of any such advertisements to the Borrower for its prior written approval, which approval shall not be unreasonably delayed or withheld. Furthermore, the Borrower agrees to include a reference to the Arranger’s role as lead arranger in any press release announcing the Bridge Facility.

If the foregoing correctly sets forth our agreement, please indicate your acceptance of the terms hereof and of the Term Sheet and the Fee Letter by returning to the Arranger executed counterparts hereof and of the Fee Letter not later than 5:00 p.m., New York City time, on September 28, 2006. The commitments and agreements of Lehman Brothers and LBCB herein will expire at such time in the event the Arranger has not received such executed counterparts in accordance with the immediately preceding sentence.

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Lehman Brothers, LCPI and LBCB are pleased to have been given the opportunity to assist you in connection with this financing, and we look forward to working with you.

Accepted and agreed to

as of the date first

written above by:

[SIGNATURE PAGE TO COMMITMENT LETTER]

$450,000,000

SENIOR UNSECURED BRIDGE FACILITY TERM SHEET

Summary of Terms and Conditions

September 27, 2006

We understand that the Borrower intends to acquire all of the issued and outstanding capital stock (the “Acquisition”) of Gold Kist Inc., a Delaware corporation (the “Target”). The Acquisition and all transactions related thereto are sometimes referred to herein as the “Transaction”. Capitalized terms not otherwise defined in this Term Sheet shall have the meanings ascribed to them in the Commitment Letter to which this Term Sheet forms a part.

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Exhibit A

Summary of Terms of Term Loans and Exchange Notes

Capitalized terms used but not defined herein have the meanings assigned to them in the Commitment Letter or the Term Sheet.

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