Health testing is essential. Most breeds carry a genetic predisposition to certain conditions. Research which tests apply to the breed or cross you're considering, and ask breeders for documented proof. Seeing the mother and ideally more of the family is important. Always ask to see the mother with her litter in the environment they've been raised in. Visiting where the puppies were raised matters; puppies raised in a busy part of the home tend to have more incidental early socialisation. See the whole litter together before purchasing. A good breeder wants to educate you, not just sell to you. Match the litter's purpose to your life by discussing the breeder's intentions for the litter. Paperwork matters including Kennel Club registration and contracts. Expect to be asked questions about your home and experience. Bring your puppy home at 8 weeks for optimal development. Do your homework beyond the visit by researching online presence and reviews. Be prepared to wait on a breeder's list rather than rushing. Get the right support through guides and training programmes.