How to know if a puppy breeder is good?

Mainly if the puppies are healthy and what to look for in buying them and which puppy is right for me from the littler

A list of specific health checks done before breeding and / or on puppies before selling.Examples might be CERF (eye), OFA (hips, heart) thyroid tests, von Willebrands Disease (blood clotting) and BAER (hearing) as appropriate to the breed. You must know which problems are likely to occur in your breed and what checks should be done. "Vet checked" is too general – that is a yellow light, particularly if given as the answer to "What health checks do you do?"A lifetime take-back guarantee with the requirement that you return the dog or get approval for a new home if you cannot keep him.Good breeders do everything in their power to prevent their puppies from winding up in an animal shelter or a pen in some friend of a friend's backyard.A detailed writtenapplication required.Good breeders put too much work into their puppies to sell them to just anyone, and they have learned by experience what kinds of homes are likely to work out and which ones probably will not. Most, but not all, require a written application.The breeder makes sure you know the breed's drawbacks and any special breed requirements.All breeds have some drawbacks. If the breed you're considering drools a lot, is hard to housebreak, does not live long, or may instinctively chase and kill small animals, or (fill in the blank!), a good breeder makes sure you understand those characteristics. If your dog must be kept as an indoor dog, must always be leashed or fenced, requires lots of grooming, or is subject to heatstroke, a responsible breeder tells you these things upfront. If a breeder starts to sound like a used-care salesman, telling you only the good things and she refuses to talk about the bad ones, find another breeder.A written contract with specific requirements and guarantees.But watch out for extremely restrictive contracts – for example, specific feeding instructions or you forfeit the dog, no vaccinations regardless of veterinary advice, etc. This may be a very dedicated breeder but is likely to be way more trouble than you want. In special situations, good breeders may offer a special deal for retaining control of the puppy. You get a cheaper price, but the breeder's name stays on the puppy’s registration papers as "co-owner". Though a breeder who cares about her puppies will encourage you to keep in touch, a breeder who cannot let go of control can be very difficult.A written health record for your puppy.This should include the date of whelping, any health problems he had, the date and kind of each shot he got, and the dates of worming and drug that was used. Your vet will want this information and having it in writing makes it much more likely that your puppy has gotten the care he needs.

What the above answer described is a breeder that will charge you over $1000 for the puppy. I think if you find a nice family that seems to really care about their animals then thats all you should worry about. Any dog can get sick no matter what tests were done on the parents. Honestly is you dont have a specific breed in mind then you should just adopt from a shelter. They have alot of cute puppies that need homes. Look at alot of different ones before making a choice. Do a little research on puppy care too. Good luck!