[mikey1985]

You should ask to see the parents, bc that will be a good indicator of what size the puppy will be (but not always an exact science, its hard to completely predict adult weight). A good breeder should have at least one of the parents (the momma) there, and you can check out their living conditions. Also check that there is a good health guarantee, and whether puppies have shots, are wormed, if they've had a bile acid test and luxating putella test. The last two not every breeder do but it will indicate whether they may have health problems in the future. This is what jumped into my head, I'm sure others will give you some additional tips. Congratulations on finding a baby!