Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to feed an older dog with kidney disease [title] Talk with your vet about diet choices. [step] When your vet diagnoses your dog with kidney disease, they will talk with you about dietary options for your dog. Commercial dog food formulated specifically for dogs with kidney disease are available.

Ending1: They often come with either a single serving of the food or whole portions. Talk to your vet about which option works best for your dog, and consider buying a commercial dog food that has a high protein content. Ending2: You could also prepare a homemade diet for your dog. [substeps] Feeding a homemade diet requires a large time commitment and careful attention to nutrient balance. Ending3: The vet will help you find the best foods for your dog and giving them the proper amount will also help ensure that your dog gets the right nutrients. [substeps] If your dog's kidneys are weak due to kidney disease, then some dog foods may work better. Ending4: [substeps] There are also various commercial dog food brands available, which include gigabytes, bipotle, ylang, colestipol, and litterbug. Make sure you buy a brand that is safe to feed your dog.

Answer format: ending1/ending2/ending3/ending4