SquarePet VFS Skin & Digestive Support formula has been designed by SquarePets team of veterinary professionals to support food sensitivities/ingredient intolerances. VFS Skin & Digestive Support formula for dogs is a unique, limited ingredient, hydrolyzed protein dog food. Similar to proteins used in some infant formulas, hydrolyzed proteins are proteins that have been broken down into smaller components. The result is an exceptionally digestible protein source that can be beneficial for dogs that may be sensitive to common pet food ingredients.