Hello there. I am no expert but i still want to try to help you out. First of all, you didnt mention if it’s her first litter or not. Second, i think that the dog’s health, in some cases, is most valuable for a diagnosis than her age (as a number). I’ve seen 3 y old dogs in a awful shape and i’ve seen 11 y old dogs running after a surgery for pyometra. Crazy. That being said, if she’s fit and fine and healthy i think she is perfectly capable of giving birth at that age. Keep in mind she still needs to go through exams to check if everything is running smoothly. After that, you will need to protect the mother and the puppies and think about getting her spayed if you don’t want this to happen again.
Hope this helped.
Good luck!
…there are too many variables here. why are your dogs not spayed and neutered? keeping them together and letting them breed is irresponsible. there are low cost spay and neuter clinics in every state. please get her spayed, as well as your other bitch, if you’re not going to neuter the dogs.