I've never experienced this w/males, only Puddy, my calico. Having had bladder infections myself, I can tell you that they're miserable and painful. My vet has told me that if I have an emergency just to come in. Call first and let them know I'm coming but just come in. Do you have any left over pain meds and/or antibiotics that you can give Decker until he can go in tomorrow? I sure hope that he isn't blocked. Prayers going up that all will be well.