Our house cat that we have had about 9 yrs had been not eating and drooling from the mouth so my dh took him to the vet. They said he had mouth cancer so they sent dh home with some canned cat food and some powdered holistic med to give him mixed in with his food. They want him back in a week to see if there is any improvement. Anyone have any experience with this? I am thinking that maybe we should just put him to sleep because we don't know how much he is suffering. Am I being cold hearted?