
There are two ways of looking at this. If he's the very best dog you could possibly use on your bitch then bite the bullet. The pups will be born around early March and ready around May. That sounds lovely. Otherwise wait till the next season, six months will make no difference in my opinion 4 years old or 3 1/2, pups born August sometime and ready October ish, that's alright too. I think if this were me, I'd be hanging on the 6 months.
However, she might not even come into season when you think, my normally 6 month between, waited 8 months this last time. Stud dog owners are used to the will she or won't she scenario.
Good Luck.
Dawn R.