I am very sad to report that my rat Timothy has a tumor on the left side of his lower belly. I dont really know what to do about it. Should i leave it and let him live out the rest of his days or should i take him to a vet to see if the can remove it. Also he is 1.5 years old and I don't know if it is a good idea to operate on him anyway. He is still eating and drinking. He still comes up the the cage to say hi to me so I don't think it is bothering him. Also if I do leave it when it gets huge and he can't walk around or eat and drink should I put him to sleep? I was really wishing I would never have to post this but here I am. (SIGH).