My Levon was diagnosed in September, and in remission less than 2 months later. I feed him b.f.f. by Weruva, 8 oz (1 cup,more than a can) each day. His BG numbers are good, but he is still losing weight. He's also vomited about every other day for the past two weeks, twice with hairballs. Blood test show his thyroid is ok, kidney levels are high normal, but everything else was normal. He becomes aggressively hungry about 2 hours before feeding times (he bites and basically acts like a jerk.) My vet now says that the next thing to look at is some problem in the digestive tract (thickening of the walls, or a tumor) with a $300 ultrasound. My questions: Could there be some other problem that caused high glucose levels besides diabetes? If he is OTJ on food alone, and he is hungry and losing weight, would feeding more be a good idea? Or could that cause the diabetes to come back? Is an ultra sound at this point a case of excessive diagnostics? Thanks for any input.