Is it possible to get a "poor quality" (show dog) puppy from excellent (bloodlines) parents, grandparents etc. and does this means that he/she also will continue to give "poor quality" puppies or not?

Yes, it’s entirely possible. Breeders often (if not usually) cull a number of animals from a litter for poor quality. The lucky ones are sold as pets, with a contract that says that both parties agree to neuter the animal. The unlucky ones are merely destroyed.

Poor breeding results should not be promulgated by further breeding – you don’t get ideal breed examples out of less than ideal parents.

It happens all the time, and the genetic distribution has a kind of randomness to it, (due to haploid cell division in zygotes) but there is a higher probability of a “defective” dog to pass along the same traits, so selective breeding tries to use those individuals closest to the standard. Of course, breeding for looks has deleterious effects on the breed, too.

@syz is exactly right. We had a collie (he looked just like Lassie) that we bought from a breeder. His mother was a champion show dog, but due to some glitch in the breeding process there was a high risk that any puppies our dog fathered would be born blind. My parents didn’t pay as much for him as they would have for a dog that could be used for stud purposes.

He was a wonderful dog and made a great pet, which is what we wanted.

thanks for the answers!....but how is it possible than that a dog that i know, which has e.g. a “longer body”, sired a bitch and their puppies were “short”?

It’s a genetic crap-shoot. You can increase the chances of throwing a certain “type”, but there are no absolutes.

Dogs are considered genetically “hypervariable”, which is why we have everything from Chihuahuas to Great Danes.

My Aunt breeds Flatcoated Retrievers and, whilst she only breeds from dogs that have had and passed a number of necessary health checks, every so often a poorly puppy will be born. Sometimes they die naturally within 24 hours or so, she had to have one put to sleep a few years ago and one she just kept as a pet (he was born with a deformed foot and so couldn’t work easily or be shown), despite the vet saying he wouldn’t live much past a couple of years he survived until he was nine. Obviously, she doesn’t breed from any dogs that are born (and survive) with any kind of health problems and thankfully in over 30years there haven’t been many poorly puppies.

I suppose it’s no different to people. Two, seemingly health adults can have a child that has serious health problems.

@leanne1986 thanks! i wasn’t thinking about “poor quality” puppies in terms of “unhealthy” i was rather thinking of healthy dogs that just have some undesired traits e.g. longer tail, shorter legs etc.

@krizan Oh I see. I’ve known that to happen as well.

My god how depressing. Of course one can get a purebred that won’t show well. I hope you did not buy the dog just to show or breed. If you cannot love this dog for itself, do it a favor and find it a new home.

Sure, same as good looking humans can produce ugly offspring.

Conscientious breeders research bloodlines for many generations back before breeding but there is never a guarantee.