I've tried over 400 times, and likely over 60 times while my Newfie girl was in heat. But alas, I can't seem to get her pregnant! I'll keep trying to impregnate my dog, lord knows I don't use condoms. Lol
Anywho, if the offspring came out looking like dogs, then I wouldn't mind impregnating her once, but if the offspring looked like a half human/half dog, then no freaking way! The government would be all up on my ass.
I will say that one of the biggest advantages of have sex with animals is being able to have all the raw and unfiltered sex you and your partner wants without having to worry about getting her pregnant.