They can have 4-13 puppies in one litter with an average of 8 puppies.As a breeder of Bullmastiffs since 1984, they can have anywhere from 1 pup to 15 pups. The average being around 7-10 pups in one...
pit bulls have 10 to 15 puppies.
You can't really tell unless you're a dog expert. You can guess though. Ask a vet or someone at a humane society.
wait and see