My furball was diagnosed with intestinal tumors in June, he was given a couple weeks. He fought through I don't know what kind of pain, continued to eat and keep his plumbing going until December 12th. Every morning I woke up i was amazed and blessed to have him jump on the bed when he saw me stirring and he heard cars start moving around outside. I have an idea what sort of anxiety you gotta be having for your friend, I feel for you. God Bless.

Hopefully it's not too severe and you can adjust his diet.