Keep an eye on Jim. One evening, I brought Ming home from the vets after they unblocked him. He let loose a river in the vet's office as we were leaving and I thought that all was well. Well, he started straining again as soon as I got him home and first thing in the morning, I brought him back in. Yep, he was blocked again. The vet was glad I did that because they can get uremic poisoning and die if you leave them blocked to long. So, just watch him, please!