My four year old cat ming was released from the vets where he stayed overnight yesterday for bladder blockage. He had a catheter inserted and the his bladder drained. Vet said he was peeing normally and was doing well. He has peed a decent amount since I brought him home. The vet gave him a special diet of food that will help prevent crystals and or sediment building in his urethra. He is on an antibiotic and a steroid for a while. My question is he seems to be more lethargic than normal is this normal post this kind of event for a cat?