Hi, I thought about the food change being a part of the problem, but I really don't want to switch him back. He was on Iams and now he is on Innova Evo and I love the quality of the new food so much more... he went to the vet the other day and they ran a full blood workup on him, results should be back by Friday. Vet said he is healthy and happy, and the urine test should nothing, so we'll see on Friday!