Hmm - this testicle thing is very interesting. If I were to be 100% certain, I would not and should not breed from our boy again. But our vet was so adamant that the fault did not lie with him, I am tempted to use him again. Then if any more males were born with 1 testicle (and presumably any females would also be carrying the "one testicle gene") then I would definitely not allow him to cover another bitch again.
Even though a dog with one testicle is undoubtedly still fertile and capable of siring offspring, I believe it is totally wrong to breed from any dog or bitch with a known genetic fault. After all, this is why there are thousands of known genetic diseases endemic in "pedigrees" - breeders continuously carrying on breeding from their animals just because they look the part at dog shows and keep winning the prizes. I mustn't go down that route, else you'll never shut me up, but what attracted me to wuffs was not just their gorgeous looks, but their health as "mongrels".
A bit of a Catch 22 situation I'm in. I'll need to have another discussion with the vet before using our boy as a stud again.
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