Since I had my cat operated on for a cancer on the ear operation (8
weeks ago) he has been acting differently.
He stays in the same spot; under the kitchen chair.
He doesn't clean himself as much as he use to.
He is eating less than he use to.
His movements are slow.

He is an old cat. Do you think the operation might have been too much
for him and has caused this behavour?

He meows at me when I walk into the room but I don't know what he
wants as he is getting food and water + attention.

Regards Brian