Hi there. I’ve dealt with a few sore hocks situations. Just want to make sure what your referring to is actually sore hocks. Is the sore on the heel area of the foot? Is there a scab like it may have been open at one point. Is the skin cracked or sore to the touch?
There are numerous things that can cause sore hocks: lack of fur on the feet, wet bedding, long toe nails, overweight bunny. Some rabbits just get them for no apparent reason. My Mini-Lop has super furry feet and lives in a cage with lots of fleece blankets and faux-fur pads and still has problems with his hocks occasionally.
What is your bunnies living area like? What sort of floor is he on most of the time?
There are several things you can do while waiting for the vet. Most important, make sure his nails are as short as can be. Keep his cage very clean and dry. Make sure he has plenty of padding in his cage. Filling his cage with a deep bed of hay is best and add a fleece blanket to his sleeping area (make sure he doesn’t chew or eat it). An old wives remedy that I’ve had some success with is make a compress with a warm tea bag and apply to his foot for as long as he will tolerate. 5 minutes is a good amount of time. This helps harden the callous. You could also ask your vet if they have any Derma-Gel. This is a veterinary ointment that can be applied to help seal the sore. You have to put it in a thin layer and blow on it to allow it to dry.
Good luck with your bunny’s feet. If you have any more questions, feel free to ask.