My male shorthair was neutered as soon as the vet judged him to have fully developed (about 9 months). He was raised with a female kitten and since that time we inherited two more females, all of which were spayed. He never displayed any untoward reaction to his "sister" or the oldest female, but the middle female has become the object of his desires. He has forcibly mated with her (very much against her will) several times. Has anyone out there ever heard of a male cat being able to mate even after neutering? Is there something we can do to stop him? The poor female has closeted herself in one room and is terrified of him. I've had a neutered male shorthair before and didn't have this problem.