Always remember that it is far more important to buy from the breeder you feel the most comfortable with and not the one who has the puppy when YOU want it. It makes no difference when you bring a pup into your home. Spring, summer, fall or winter, it's going to be work. Good breeders work around the female's schedule and puppy mills work around the market. Good breeders produce high quality dogs for show and pet. Pet breeders generally produce a lower quality dog for profit only. A good breeder works very hard  to produce all perfect pups and when something goes wrong, a good breeder stands with you and supports you. You always have the right to choose.