Fleas are common in the summer months. Although they may seem harmless, flea infestations can kill rabbits, dogs and cats by causing a deadly case of anemia. The borate treatment is usually guaranteed for a year. Be sure the products used are safe for rabbits. Sometimes the rabbit forms calluses and get along just fine.
Problems arise when the skin turns into an open wound.
You may notice the rabbit favoring a foot as he tries to avoid putting weight on his hocks. Causes are numerous, including wire cage bottoms with no resting area, a damp resting board, wet bunny beds or dirty litterboxes. Overweight and large-breed rabbits are particularly prone to sore hocks, as are the Rex breeds, since they do not have a lot of padding on their feet. If there are open wounds on your rabbit's hocks or if the area is swollen, see your veterinarian. To prevent sore hocks, give your rabbit a soft, clean resting area.