I assume you mean the first dog had a litter of 8 puppies and the second dog had 3?
If so, go and look at both litters. Ask to see both the parents.
Some dogs have small litters, but that doesn't mean the puppies are sick. Look for a puppy who doesn't run up right away, but doesn't shy away.
Look them over and check their fur, their size and thier temperament.
If the parents look healthy, than the pups should be too.