Neutering is major abdominal surgery for your cockrel, and traditionally was done in the backyard without anesthesia, by the flock owner. Many died, and it's brutal. Your avian veterinarian may be willing to do your young birds, and some will die with best care. Doing an older cockrel/ cock is much more dangerous, and much less likely to change bad behavior. It will also be difficult to manage his weight; caponizing is meant to produce a large chubby table bird, not a long lived pet. Mary