Check out this web place and read ALL OF IT , also watch the videos.
It will have lots of information that you need . Dog Breeding and Canine Reproduction by Debbie Jensen. Dog Breeding and Whelping guide for dog breeders.
Hope you and your dogs all stay well.
Xoxo
__________________ "The reason a dog has many friends is because it wags it's tail instead of it's tong " [I]Smartpuppiepets@yahoo.com /I][   |