When he wasn't getting the fluids he wouldn't eat and he was very lethargic. The vet did some tests, and at that time said it was related to kidney function.

My parents are trying to decide if the test is worth it. He's 14 almost 15, and he's not suffering or in pain of any kind, and the test is very expensive. They are just wondering if continuing with what they are doing would be fine, since it seems to be working