Allotta times one sire produces all the pups as his sperm covers all available eggs. But when it works, it's pretty cool to get two litters in one
my guess is to breed them back to back...that should give the second male a better chance to sire more pups...
before there was such a thing as DNA testing I bred 2 Airedales and on the final day that the female Airedale was in heat I bred her once to my cur dog and I got one pup that looked to be 1/2 cur and all the other pups looked like pure Airedales...
