While I can't tell you this is the only Chinese producer of some of WalMart's rawhide products, the company has certainly admitted they are one of them:

http://jshuaxing.en.alibaba.com/product/50372448/51737342/porkhide_twist/Smoky_Porkhide_Twist_by_FDA.html

Smoky Porkhide Twist-by FDA
Place of Origin: China  Model No: 5"/30-35g/pc 
Certification: Wal-Mart 

http://jshuaxing.en.alibaba.com/aboutus.html

Jinhu Huaxing Industry Co., Ltd
1 Huahai Road, Industrial Park of Jinhu County, Huai'an City, Jiangsu Province. China 

Note they say their Quality Assurance and Quality Control is done by third parties (unnamed).

http://www.jinhuhuaxing.com

Company website--"Page cannot be displayed".

You also see from AliBaba that they do contract manufacturing--your name, etc. on the packaging.

We have more "by FDA Testing" products sold here--none of them says "WalMart", though.

http://jshuaxing.en.alibaba.com/product/50235754/51737104/Knotted_Bones/Bleached_Rawhide_with_Chicken_Knotted_Bone_by_FDA_Testing.html

Bleached Rawhide with Chicken Knotted Bone, by FDA Testing

http://jshuaxing.en.alibaba.com/product/50371693/51732007/green_dental_bone/Five_Star_Green_Stick_by_FDA_Testing.html

Five Star Green Stick-by FDA Testing

http://jshuaxing.en.alibaba.com/product/50235758/51737237/Twist_Dog_Chews/Natural_Rawhide_Twist_by_FDA_Testing.html

Natural Rawhide Twist - by FDA Testing

http://jshuaxing.en.alibaba.com/product/50247786/51736926/munchy/Munchy_Strips_by_FDA_testing.html

Munchy Strips-by FDA testing

http://jshuaxing.en.alibaba.com/product/50372448/51737011/porkhide_twist/Smoky_and_Chicken_Basted_Porkhide_Twist_By_Fda_Testing.html

Smoky and Chicken Basted Porkhide Twist-By Fda Testing