Dear Christopher Cat
When my cat was neutered, the veterinarian could find only one testicle, even after exploratory surgery. My cat’s urine continues to have a strong odor, and his behavior suggests he has a second testicle that is producing testosterone. How can I find out?
When Mom neutered me, her job was easy, because both testicles had descended into my scrotum, as they’re supposed to. It sounds like your cat wasn’t as considerate.
The most cost-effective way to determine whether your cat has an undescended testicle is to examine his penis. If it is covered with tiny spines, he is producing testosterone and therefore has a retained testicle.
The other method is to have your veterinarian measure your cat’s testosterone level after injecting a hormone that stimulates its secretion if there is a retained testicle.
It’s rare for us cats to have only one testicle, so when you check your cat’s penis, you’ll probably find it has spines. During breeding, these spines stimulate the female cat to ovulate.
After neutering, penile spines regress within six to eight weeks, leaving the penis smooth.
If your cat has an undescended testicle and your veterinarian doesn’t care to search for it again, make an appointment with a shelter veterinarian experienced at neutering cats with retained testicles.
Alternatively, consult a surgical specialist – or a general practitioner who enjoys surgical challenges.