Look at the puppies surroundings. Many breeders if they keep a number of dogs, and top breeders do, don t live in posh homes. But they should be clean, well kept and the other dogs you see should be happy to meet you. Some breeds like the guard dogs will do their job and make a lot of noise protecting their owners property, so don t be put off by seeing a dog do what has been bred into them for hundreds of years. If you are given the opportunity to pick a dog from a multi-puppy litter try to pick the puppy that seems the most outgoing and gregarious.
Nobody wants to own a wimpy dog.
But remember different breeds have different personalities. If a three month old puppy is going to lick your face the first time you lay hands on him, he is going to be a smoocher as he becomes full grown. If they a re shy or standoffish they are not going to become personality dogs when they are full grown. That again is why you don t want to buy a puppy too young. The last litter we bred was only three puppies 2 dogs and a bitch.