Hi - my 9-year-old collie was diagnosed last month as hypothyroid, and the vet prescribed
levothyroxine sodium, 600 mcg once a day with
food. He has developed diarrhea and last night couldn't keep even chicken and rice down, vomiting it up in the night. He is hungry and eats, but it runs through him. Should i stop or reduce the levothyroxine? Thank you so much for any ideas. BTW, the diagnosis was clear with his thyroid number (not sure it is T4??