Up to what age can a dog have puppies?

My dog had puppies on 3 Dec 2009. How long before she will go into heat again?

How do I know when my dog has had her last puppy? Should she go to the vet if shes takeing too long?

How long does a take a dog to have her puppys for the first time

My new boy puppy is sucking on ma female dog' teets. She is not his natural mother. Is this ok?

Im trying to find out the kind of puppy dog gave beth on her birthday, I would like to have 1

How can you tell the age of a dog? I work at a shelter and all of the vet techs look at their teeth but I never have asked wh...

At what age should baby born puppies eat canned food and the pebble food and should stop drinking milk from mom

How long will it take for a beagle to deliver puppies

how long does it take for my female dog to deliver her puppies? we already know shes pregnant for sure

I have a pregnant dog, & this is her second time. How can I help her taking care of the puppies..