A wide range of aqueous based soaking operations can be employed to impregnate substantially throughout various rawhide pet chews; suitable substances for release into the oral cavity of pets during chewing include emulsions, surfactants, conditioners, flavorants and/or active ingredients. Prior to impregnation, the rawhide chews are physically disrupted/penetrated to augment substance impregnation substantially throughout the chews.

 
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> Patch bag with patch containing high and low crystallinity ethylene copolymers

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