He's just not interested in his food. There is only one type of food he can eat because of an intolerance to protein and I think he's just bored of it. I've been adding a bit of gravy to make it smell nicer which works for a bit but I'm worried about whether he can tolerate gravy. I've microwaved it thinking that might make it seem more palatable. He wants treats. I give him gravy bones and chicken with his tablets in. But too much meat and it goes straight through him. Will he just eat when he is hungry? He's barely eaten since Tuesday. He is very old and I am worried that this is a sign that he is giving up.