The scrotum is not removed during surgery, so it can appear at first as if nothing has been removed, especially if there is a little swelling after the operation. However, the scrotum will gradually shrink as time goes by.
The most common methods for sterilizing female and male dogs are ovariohysterectomy (spay; which removes both the ovaries and the uterus) and castration (neutering; which involves removing the testicles), respectively.
Neuter is the term used to describe the surgical removal of a dog's testicles. The typical age for neutering a dog is between six and nine months. Neutering has several benefits, including health and behavioral.
When neutering a dog, both testicles and their associated structures are removed. This procedure is also known as castration. Neutering renders a male dog unable to reproduce, but any behavior related to breeding instincts, like humping, usually ceases—but not always, says the AVMA.
Neutered dogs do not have testicles. A couple of things could be going on with King. Dogs that are neutered early in life (as I imagine yours were) have their testicles removed when they are very small. The scrotum does not develop in these dogs.
The surgery is a safe procedure and recovery is generally uneventful and aftercare is minimal. The operation is performed under general anesthesia and the testicles are removed through one small incision made just in front of the scrotum.
Vasectomy: only the vas deferens, which conducts sperm from the testes, are removed. This procedure makes the dog or cat unable to reproduce, but his testes remain and will produce hormones.
The testicles themselves are removed during the neuter, so they're definitely not still there. If you have any concerns about how it looks, you can always have him rechecked next week with the vet who did his surgery to make sure everything is healing as expected.
After surgery their scrotums will be intact but devoid of testicles. Connective tissue and tied off blood vessels in the scrotum can sometimes look like testicles from a distance.
Neuter, or castration, is the term applied to the procedure of surgically removing the testicles. Castration (orchidectomy) is a surgical procedure involving the removal of both testes. A pet owner may elect to perform this surgery in order to eliminate the sex drive and the ability to reproduce.
Swelling of the scrotum normally occurs after surgery. This may make it look as though the testicles are still in the scrotum, even though they have been removed. The swelling should go away after several days. It is very important to prevent your pet from damaging the incision site by licking at the area.
The scrotum is often swollen in the first few days after surgery, leading some people to wonder if the procedure was really performed. If the dog is immature at the time of neutering, the empty scrotum will flatten out as he grows. If he is mature at the time of neuter, the empty scrotum will remain as a flap of skin.
The testes develop near the kidneys within the abdomen and normally descend into the scrotum by two months of age. In certain dogs, it may occur later, but rarely after six months of age. Cryptorchidism may be presumed to be present if the testicles cannot be felt in the scrotum after two to four months of age.