If your Bichon has retained testicle(s)

, that is the testicle(s) is(are) not descended into the scrotum, then it's best to neuter him.? This condition is called
cryptorchidism.
As mentioned in the
WHY SPAY & NEUTER YOUR BICHON thread, Bichons with retained testicle(s) are susceptible

to developing tumor and cancer

(namely testicular & prostate cancer).? So for health reasons, you should, imho, neuter your Bichon.

Usually, by the age of 6 months, one (especially a vet) should be able to tell if a Bichon suffers from cryptorchidism (by palpating the *ahem* area

)

Such cryptorchids can still impregnate a female

.?

As this condition is hereditary, these Bichons should not be bred from.? Likewise, your Bichon's sire.

Call your breeder and inform him/her about your Bichon's condition.... at the very least he/she would no longer breed from your Bichon's sire and your Bichon's littermates.

In a litter where only one cryptorchid is present, the rest of the normal pups (females included) may still be carriers. So, they should not be bred from too.

If your breeder knew of his/her breeding stock's condition and YET still bred from him

, then he/she is not a very responsible/knowledgeable breeder
(not meaning to step on anyone's toes, just making broad sweeping general statements)Here's a list of definitions pertaining to this condition......
CryptorchidismThis is a condition concerning the testicle(s) of a male dog.
Unilateral CryptorchidA male dog with one testicle descended, the other retained within the body.
Bilateral CryptorchidA male dog with both testicles retained within the body.
AnorchidA male dog with completely no testicles at all.
MonorchidA male dog with only one testicle regardless whether it is descended or retained.
Hope this info helps
