There is a prescription food for thyroid issues, Hills Y/D. It's only available as a dry food. See the links above for other suitable non-prescription foods that are available as canned.
Weigh gain should be done gradually so the body can adjust. Ask the vet if a high calorie food or supplement can be used.
Weigh gain should be done gradually so the body can adjust. Ask the vet if a high calorie food or supplement can be used.