Infertility is not a common problem in Siberians

Far more common is the problem of cryptorchidism. Monorchidism is the term applied to a dog which has only one testicle; the other testicle is simply not present, either descended into the scrotum or retained in the abdomen. Bilateral cryptorchidism applies when both testicles are present but not descended into the scrotum. Unilateral cryptorchidism means that only one testicle is descended and he other is retained in the abdomen.

A cryptorchid should be checked by a vet at about a year old since there is an increased risk of testicular cancer in retained testicles. Many vets recommend routine removal of retained testicles, and most will castrate the dog at the same time.

However you should consider this carefully before going ahead with castration. The dog's coat growth, in both males and females, is largely hormonally controlled. Castration and spaying removes that control, which can prove disastrous in a heavy-coated bred such as the Siberian, If one testicle is descended, you can ask your vet to remove the retained one since the descended testicle will still produce the hormones that the dog requires for normal coat control. This is particularly important in a dog that is being exercised heavily and absolutely essential in a long-coated Siberian.

Some people advocate castration as a means of subduing dominant behaviour, but this is rarely effective. 

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