It's not my place to past judgement on the breeder in questions as, as others have said, we don't know the full facts & only know 3rd hand.
.......but I can only speak from my experience & opinions I now have.
As some of you may know, we had a litter of pups from Purdey over 4 years ago (all done above board with health tests & long standing breeder support etc) - she healthily delivered a litter of 9 & all survived. When eyes opened at 14 days is became apparent there could be problems with two of the pups eyes. Vet referred us to (well known & renowned) ophthalmologist - he diagnosed micropthalmia (small eye) - more common in Cavaliers King Charles spaniels/Australian Shepherd dogs but can affect any breed & USUALLY the whole litter would be affected. Our specialist had to PTS a whole litter of boxers born with it not long before we were referred
Tinker had the most severe symptoms & is blind (one eye removed in Dec '10) - we were offered to P her TS - but couldn't & chose to keep her with us.
She is an extraordinary, unique & very special BUT needs far more time & commitment than a 'normal' pup/dog & her life with her mum & sister is one of careful management & routine to keep everybody happy......she's a fiesty little character, that's afraid of no other dog & who's not afraid to stand her ground
Although two very dear friends wanted her, I was reluctant to home her to anyone - irrespective of how lovely they were, as I worried they wouldn't be able to cope or give her what she needed for life. As she has aged, it is now obvious she has breathing problems too - an elongated palate (operated on in Dec '10) & probable nasal deformities.
I don't know what would of happened if the whole litter had been affected - thankfully I won't ever have to but it gave me an insight into the huge responsibilities you have when breeding - from the moment of conception right through to when those pups are old & go to the bridge - they are always your responsibility.
Personally I couldn't PTS two little pups that were 'just' deaf or any other abnormality that wouldn't affect their quality of life BUT breeding isn't so black & white & there are so many other factors that you nor I know or understand.
It would be naive to think that all breeders are thinking of the pups quality of life above their reputation when having pups PTS (& this breeder may be one ) but as we don't know all the facts & would be inappropriate to comment