So I was playing with ideas, and I was wondering...
when would a female Luperci be too old to have puppies?
also, when would a male luperci be too old to father puppies?
I actually did some research on this when I was working out how old to make Soran's youngest litter, I think at 8 they're still viable, the only information I could find on it was that a female dog at eleven could get pregnant but it was a huge risk to their own health and often the pups were all stillborn. But it would be possible before the age of ten I suppose they could have a litter so long as they took it easy.
(Hope you don't mind me throwing in my two pence/cents)
Actually it differs for canine species. Wolves don't have a cut off time like coyotes do. But then again sexual maturity is also different between the species and 'Souls has it set as a specific one for all species.