
I would also say proceed with care, check the breeder out with their peers (breed clubs) as this is the most bred dog in the UK, and sadly many thousands are bred by less than caring breeders and on a commercial scale, and there are many pin money back yard breeders only breeding with saleability in mind.
Google the breeders name, and the kennel affix, do show and trials obedience results come up? Go onto the Kennel Club website and input the parents details in the health results tool.
Wheat you really want to find is a breeder who is a true breed devotee, works and/or shows their dogs and is first and foremost interested in developing their line and preserving the breeds god traits, temperament and with health foremost.
Such a breeder will tell you the purpose of the litter (it shouldn't be simply reproduction) it should be about fitting members of it into their working or breeding plans. Such a breeder will happily tell you why they selected the sire for that particular bitch, and what they hoped to achieve by doing so. they will be working with a long term plan in mind.
You may just want a healthy puppy for a pet, and that is what the majority of puppies will become, but the litter such a pet comes from should have been bred with something more in mind.