How old can a male dog be before he can breed?

at about 7-8 months, dogs do just fine as sires.

Uh oh. Be careful. I posted a question here asking if it was okay to have a pet give birth to her own puppies, and I got people accusing me of being a wannabe greedy puppy-miller and all that. That was not pleasant.

Has he started humping your leg yet?

6 months old,i just bread my male