Has anyone heard of this? My boy blocked up last tuesday(see post in cat nutrition) and we took him to the vets today to have the catheter removed after having it in place for 6 days. He has been home 5 hours and has not urinated anywhere in the house, yet is straining to go every 5 minutes or so and nothing is coming out. I called the vet who said that the likelihood of being obstructed again the same day the catheter was removed is very very slim. So, do we wait? How long do we wait? We're on tenterhooks waiting to see him pee!