The reality, of course, is that litters are much smaller and that it is even possible for dogs to have a litter of only one puppy. Although rare, these singleton puppies, as they are colloquially known, have unique care needs. Miniature and small breeds, on average, produce 3 to 4 puppies in a litter, while large and giant breeds can have 7 to 15 puppies. Now, consider that a dog can be fertilized several times throughout her heat, by more than one dog.
Let's take all of this together, and it's pretty obvious that a single litter for puppies isn't typical. It's an aberration, and when a single litter of puppies occurs, it can cause behavioral problems. There is no normal litter size for puppies. Usually, the size of a dog litter is mainly based on the size of the dog's body simply because biologically, larger bodies are capable of carrying a larger litter than smaller bodies.
The size of the litter also depends on the breed of the female. Some small dog breeds only give birth to one puppy at a time; we call these breeds singletons. The breed of a dog is one of the most important factors influencing litter size. In a nutshell, larger breeds produce larger litters.
That's why Shih Tzu, Pomeranians and Chihuahuas have litters that usually range from one to four puppies, while Cane Corsos, Great Danes and other giant breeds usually give birth to eight puppies or more. This will not only allow the veterinarian to count the number of puppies present, but also to inspect their bone structure and observe any abnormalities. We have a mastiff pitbull mix that got pregnant with a Newfoundland and had 16 puppies this time 12 that survived and the last time had 15 puppies all survived the same mother same father both times fathers like mothers of 3 years like four or five. Towards the end of your dog's pregnancy, the vet will likely be able to feel the mother's belly or take an X-ray to determine an “exact number of puppies in their belly” (although it can be easy to miss one of the puppies, so you'll never know for sure until the little wiggles start to come out).
Other evidence that dogs are destined to have several puppies is in the size of the dog's uterus: it is destined to have many puppies. As mentioned above, litter size varies based on several factors, but for the sake of discussion, we'll assume you have around five puppies in each litter. A female dog usually has eight to ten nipples, divided into equal rows, so that a large number of puppies can breastfeed at any given time. Although the results are relative, it clearly shows that the more inbred the puppies are, the lower the puppy count.
Let's say that for your breed the average litter size is between 8 and 12 puppies, some breeders want to help their mother reach 11, 12 or even 13 puppies. You can't put two parents who produced large litters before and expect the puppies to also produce large litters two years later. In 2004, a Neapolitan mastiff named Tia became the mother of the largest litter ever documented, when she gave birth to 24 puppies by cesarean section. Puppies crawl on top of each other and are used to the heat, contact, interruptions, and movement that result from being in a pile of dogs.
Miniature breeds generally produce litters of 3.5 puppies, while large breeds generally produce 7.1 puppies per litter. Just because my dog, who is a Jack Russell, Chihuahua and Boston Terrier, gave birth on his own to a litter of 12 puppies, but only 11 survived. For example, spaniels and retrievers usually have between four and eight puppies at a time, while smaller dogs, such as terriers, can only have two, maybe three in a litter. Once born, all breast milk, which would normally be shared between 5 or more puppies, belongs to a single puppy.