@EdithStourton usually it's written into the contracts that the 'onus' is on the owner (not the breeder) to pay for any health related issues including any that come about as a result of the pregnancy. Not sure how they would hold up in court (a bit like regular puppy contracts), but it's very sneakily done.
And likewise, they often have clauses that say if there is anything wrong with the puppies that they are returned to live with the bitch...who by then is often back in her own house rather than with the breeder.
The whole thing is absolutely awful. And sorry to say @VanGoSunflowers there's literally nothing to be done. As long as people are willing to pay for these puppies and turn a blind eye, then the RSPCA and other organisations (which are horribly snowed under) will ignore it because sadly Edith is right...10 months out of the year the bitches have a 'better life' than lots of other dogs. It doesn't make it right, or palatable though and it's still abusive in my eyes.
@BigWig78 the problem with sending the bitch away once the puppies are weaned (as your friend does and as this place does) is that the puppies then miss out on significantly valuable training and education at mums paws. Weeks 6-8 are some of the most informative weeks a puppy can have. It's the the time they learn about interaction with older dogs, boundaries, house training, appropriate behaviour in the house etc. They don't learn this from other puppies or even from other dogs in the household - they watch mum and learn from mum. And by taking mum away you're more likely to have a litter that are prone to some significant, unpleasant, behavioural issues.
And by 6 weeks most bitches aren't even really ready to say goodbye to their puppies. Mine certainly wouldn't be - they're running away from the little bastards left, right and centre, of course but they still spend the majority of their time with their puppies and they're typically incredibly watchful and protective over them. I take my puppies for injections at about 6 weeks and I always have to take the bitch with me because she won't let the puppies out of her sight. I can't imagine wrenching her away from them.
Weaning does not equate to puppies or mum being ready to be separated. As with everything to do with dogs: just because you can do something, doesn't mean you should.
I have to say, kennel type working dogs or not, anyone who does this knows shockingly little about dog breed, dog and puppy welfare, and the humane and ethical way to raise a litter.