This depends on how well socialized your existing Pit Bull is. Providing it has been well socialized with other Dogs there should be no problems, but I would not suggest having two Dogs of the same sex - especially two males. It would be a good idea to get a puppy of the opposite gender to your existing Dog, just make sure you neuter/spay at least one of them to prevent unwanted litters.
All puppies are still considered "puppies" until they are about 1 year old. But if you want to know something specific about your dog/breed ask your vet
personnaly.... NO! if cats don't get on with dogs, then why would 3 cats get on with a puppy??!!
Puppy food. Quality puppy food.
about two to three months old, it varies.
no because it is old enough to eat puppy food. so giving the puppy milk is unnecessary for it.
puppy love
6 weeks old if its eating puppy food if not 8 weeks old
ok if 1 dog year is 7 human years.. a 3 day old puppy should be 21 days old cause lets pretend day=year.. so 3 year old puppy is 21 year old human.. so change that into days
You should get every puppy or dog at at least 5 or 6 weeks old.
He would be around 11 years old depending on what month the dog was born.
do it!
It is normal. Most breeders let the first heat pass and breed the female after her first year.