My cat just got back from the vet. This is his second blockage with crystals. He had a catheter in for a full day. He just came back from the vet and they close on weekends so I cant call them. It seems like he is leaking pee and some blood. Is this normal after having a catheter? its literally just leaking from him when he walks or sits, it doesn't seem voluntary at all. Has this happened to anyone?