Just got back from the vet for Rocky's checkup and vaccine update. Since starting him on his diabetic diet there has been very little poop in his litter box, sometimes none. The vet seemed to think there wasn't enough fiber in his food. I had taken some advice from the forums here and started him on Fancy Feast food. His blood sugar has been like Jekyll and Hyde but after a couple of days on FF his numbers are down. The vet scoffed and said this food might taste good but wasn't good for his diabetes. She talked me into taking home a few cans of the Hills w/d. When I got home I looked up the carb content online and was appalled to see it was 24%. Has anyone had an issue with their cats being constipated from the high protein diet? Is Fancy Feast not good for him even though his numbers are down? He did test high at the vet, but he gets stressed out from the car ride.