No, the puppies will not be dumb but if they are in a bad environment it could be possible. I hope this helped!
yes
The only way to tell if your dog is too small to have puppies is to ask your vet. Your vet will be very honest with you.
They are many risks of having puppies too early. Stunted growth, personality disorders, not good mothers, unhealthy puppies ect... You should always wait until a dog is over one year old before breeding.
Too Many Puppies was created in 1990.
With any dog, ages 6 - 7 is about it, for the dog's sake.
Take her to the local vet and they'll take care of the puppies.
Yes, a very high possibility
A dog must be sexually mature to create offspring. If this dog has been neutered, then they will not be able to have puppies. Your dog may however, just be too young to have puppies yet.
Yes, check with your vet. Only if the pregnancy is too far advanced it may be risky for the mother. But it is so important as a means to stop more unwanted puppies being born (and their puppies and their puppies...). When a dog is in season she cannot be spayed (too risky), but when she is pregnant yes.
She might be too old or have scarring from previous pregnancies.
Dogs start to produce milk when they need to feed their puppies. If your dog has milk but has no puppies, the puppies are probably inside the mother. You just need to be patient. Hope this helped at least a little bit! ;D