The PR in the Royal Canin Veterinary Diet Canine Selected Protein Adult PR in Gel Canned Dog Food refers to the rabbit protein present in the formulation of the food. Royal Canin has various abbreviations for its products to let the users know about the product features. You should refer to the packaging carefully while opting for such products. It is crucial to understand the reactions to food products of the pets. Knowing the allergens that can trouble your pet will help you choose the right feed. If you have confusion or need clarity, you always have the option to reach out to your pet’s veterinarian for details and clarifications pertaining to the queries. Your veterinarian may recommend Royal Canin Veterinary Diet Canine Selected Protein Adult PR in Gel Canned Dog Food for your pet. The reasons for the same can be your dog’s food sensitivity, which he might have diagnosed through an elimination food trial, or if your dog requires support in the long-term for their skin sensitivities.