Problems from the Buck
Young BuckBucks will not be able to father a litter if they are not mature to do it. They will probably just sit there and ignore the doe because they will have no urge to do anything to her. Bucks usually mature around 5 months old, and older with larger breeds. I have had a buck as young as 3 months of age sire a litter, so it greatly depends on the individual animal as well.
Old BuckBucks usually stop producing good sperm around the age of 5, sometimes earlier or later. Bucks mature around 4-5 months of age, for smaller to medium breeds. Larger breeds they mature around 6-8 months old. Keep age in mind when breeding especially if you want a son to replace a father’s legacy.
Split PenisBucks with this may appear to be does early on, so if you end up with a buck check this often as he matures. Sometimes the split is so small it goes unnoticed for a time until a judge or registrar detects it. I have seen bucks with splits so bad they look like a doe. Bucks with this condition should not be bred. Often they cannot sire litters because the sperm leaks out through the slit before it can be put into the doe, but this isn’t always the case. This is a serious genetic flaw that should be weeded out of a herd no matter how nice in type the animal is.
Heat ProblemsWhen a buck is in heat of over 85 degrees they will not be able to reproduce correctly. This is usually during the summer. The best way to breed during the summer is to bring the buck inside somewhere cool, and keep him there for a few weeks. Then try to breed again. A way to tell if a buck is suffering from this, is if his testicles are shriveled up and sometimes appear to not be there.
Vent Disease/Rabbit SyphilisThe vulva or penis will have a scaly inflammation with red and yellow scabs. This may lead to “scabby nose” if untreated. This is contracted by sexual contact and should be cured before bred to another animal. Penicillin ointment to the genitals is a good treatment. Others use a shot of penicillin till it is gone. It can be cured overnight if caught early. It’s also important to note that in severe cases, or cases that have gone on for a very long time, the rabbit may be permanently sterile from this disease.