Originally Posted by
morgaine300
There are actually things that can show up in blood work, and be wrong, even when the cat is acting great. Something being "wrong" doesn't mean the cat is going to act all sick. However, since it seems lab work is all they did, I'm not sure how something would show up that would make them decide he needs some expensive surgery - blood work only points a direction. Most of the time you'd need other stuff, like xrays, ultrasounds, etc. to lead you to something like surgery. (For instance, blood work can show problems with kidneys but it won't show that some mass is there that might be removed with surgery.)
So how they came to that conclusion I'm not sure. I would still keep a close eye on him, how he behaves, how he's eating, etc.