AMENDMENT AGREEMENT NO. 4 TO NOTE PURCHASE AGREEMENT

EXHIBIT 4.8(g)

SMITHFIELD FOODS, INC.

AMENDMENT AGREEMENT NO. 4

As of March 25, 2004

To each of the Current Holders

listed in Annex 1 attached hereto

Ladies and Gentlemen:

Smithfield Foods, Inc., a Virginia corporation (together with its respective successors and assigns, the “ Issuer ”) agrees with you as follows:

1. PRELIMINARY STATEMENTS.

The Issuer issued and sold:

(a) Twenty-Five Million Dollars ($25,000,000) in aggregate principal amount of Reset Rate Series O 5/10 Year Senior Secured Notes (as they may be amended, restated or otherwise modified from time to time, the “ Series O Notes ”); and

(b) Thirty Million Dollars ($30,000,000) in aggregate principal amount of its Adjustable Rate Series P 5/10 Year Senior Secured Notes (as they may be amended, restated or otherwise modified from time to time, the “ Series P Notes ” and, together with the Series O Notes, collectively, the “ Notes ”),

pursuant to those separate Note Purchase Agreements each dated as of March 1, 2002 between the Issuer and the purchasers named in Annex 1 thereto (as amended by that certain Amendment Agreement No. 1, dated as of December 31, 2002, that certain Amendment Agreement No. 2, dated as of April 4, 2003 and that certain Amendment Agreement No. 3, dated as of October 31, 2003, the “ Existing Purchase Agreements ”). The register kept by the Issuer for the registration and transfer of the Notes indicates that each of the Persons named in Annex 1 hereto (collectively, the “ Current Holders ”) is currently a holder of the outstanding aggregate principal amount of the Notes as of the date hereof indicated in such Annex.

In connection with the Issuer’s agreement to sell its Canadian subsidiaries to Maple Leaf Foods, Inc. (the “ Transaction ”), the Required Holders previously agreed to amend the Existing Purchase Agreements to exclude certain effects of the Transaction from certain of the restrictions set forth in Section 6.15 of the Existing Purchase Agreements relating to Transfers of Property by the Issuer and its Subsidiaries. Such exclusion is contingent upon certain conditions, including the consummation of the Transaction on or before April 1, 2004. Due to pending regulatory approvals, the Issuer has requested that the Current Holders extend such date until April 30, 2004.

Capitalized terms used herein and not otherwise defined herein have the meanings ascribed to them in the Existing Purchase Agreements.

The Required Holders and the Issuer hereby agree to amend clause (e) of the definition of “Smithfield Canada Transfer Conditions” set forth in section 9.1 of the Existing Purchase Agreements by deleting the phrase, “such Transfer is consummated on or before April 1, 2004”, and substituting in its place the phrase, “such Transfer is consummated on or before April 30, 2004”. Such amendment is referred to herein as the “Amendment”.

The Required Holders hereby consent to the execution and delivery of amendments to those certain separate Amended and Restated Note Purchase Agreements, dated as of October 31, 1999, between the Issuer and each of the purchasers listed on Annex 1 thereto, those certain separate Note Purchase Agreements, dated as of June 2, 2000 between the Issuer and each of the purchasers listed on Annex 1 thereto, and those certain separate Amended and Restated Note Purchase Agreements, dated as of October 27, 1999, between the Issuer and each of the purchasers listed on Annex 1 thereto. Each such amendment shall be substantially in the form of this Amendment Agreement.

Whether or not the Amendment becomes effective, the Issuer will promptly (and in any event within thirty (30) days of receiving any statement or invoice therefor) pay all fees, expenses and costs relating to this Amendment Agreement, including, but not limited to, the reasonable fees of your special counsel, Bingham McCutchen LLP, incurred in connection with the preparation, negotiation and delivery of this Amendment Agreement and any other documents related thereto. Nothing in this Section 5 shall limit the Issuer’s obligations pursuant to Section 1.5 of the Existing Purchase Agreements.

This Amendment Agreement shall be construed in connect