Does it hurt when a puppy is mated with a big dog?

It will hurt when a puppy is mated with a big dog. First of all, because of the big difference in appearance, the dog may feel pain. Secondly, when mating a puppy with a big dog, it will hurt. , if the puppy is a female dog, there is a high probability that the fetus will be too large and difficult to give birth, and even accidents may occur; therefore, it is recommended that owners choose dogs of the same breed for mating to avoid accidents.