You may not want to breed a male with only one descended testicle (the breeders will know more about this than I do) BUT - a male with only one testicle certainly can breed - it takes only one healthy testicle to produce sperm - and that's all that is needed to impregnate a female.
This same condition happens with men - and it does not hamper their sex life or cause them to be less fertile. However, the incidence of cancer is higher and other problems are also more common. This means that it is a condition that should be corrected. I would imagine it should be corrected in a dog also for the same reasons, but I'm sure there are a lot of people who don't worry too much about it too much with their pets.
Carol Jean |