Hi, Welcome to JustAnswer. I am a licensed veterinarian and I'm here to help you. Sorry to hear that Gizmo isn't feeling well. His PU/PD (PolyUria/PolyDypsia.. .drinking a lot of water and urinating excessively), could be from a few different causes. He may have a bladder infection, he may have bladder stones, he may have kidney disease, or he could be diabetic. Rabbits will usually stamp their back legs when they are fightened or painful. You said that his legs are urine stained, so the skin underneath could be very inflamed and sore.
He should see his vet there to determine what is causing him to produce so much urine, and to have his underneath side and legs checked and treated if necessary.
You may be able to care for his legs and belly skin at home, but to determine what is wrong and to get proper treatment, he'll need a veterinary visit.
Hope this helps. If you have any further questions please don't hesitate to ask. Dr. Barbara
thankyou, its going to be a challenge taking him because in the 9 years of having him he has never ever been held because he hates it,but he loves a stroke,and apart from getting him checked out when he was 8 weeks old he has never seen a vet.