
It is so hard to predict - My first American Cocker bitch had a litter of 6(only litter), one of her daughters had 2 litters, 5 in each, but her sister only had 1 litter - 1 pup!. With pugs we have had even more bizarre results - Doris had a litter of 7, followed by 1 of 2 and a single pup. One of her daughters had 3 litters of 4/5 each time, but another had 2 pups first time, then a single pup. Mabel's first litter was 3, 2nd litter 4 and final litter 5 (but only 3 survivors). Mildred, from the first litter, had a litter of 5 (only 1 survived), then mated to same dog as Mabel's last litter a litter of 6, and has just had her final litter - of 1! Her Daughter (the survivor from first litter)again mated to the same dog as Mum and grandma, has a litter of 4. I could not even begin to work out the mathematical probabilities from that lot!