flboxer said:
How often do puppies from BYB's get the major health issues? Do all puppies end up with these major heath issues? I'm sure some puppies from a BYB can escape such health issues? Correct? Thoughts?
No, not every single puppy from a BYB will have health issues. And not every single puppy from a reputable breeder will be free of them. HOWEVER the risk of a puppy from a BYB developing serious health issues is far higher than a puppy from a breeder who does health testing. That is because a lot of the diseases that boxers are prone to have a genetic basis.
A dog with hips that will turn dysplastic is more likely to produce offspring that will develop dysplasia than a dog with normal hips; a dog with BCM is more likely to produce offspring with heart troubles; a monorchid dog is more likely to produce monorchid pups, a white boxer deaf offspring... etc etc. Now you can see that a dog is white, or that it's monorchid, but if you don't do the health testing, how do you know whether or not it is affected by any other - serious - conditions that it is *likely* to pass on to any offspring?
Conversely, if you buy a puppy from a reputable breeder - whose parents, grandparents, great-grandparents, etc were tested and shown to be free of those diseases, then while it doesn't *guarantee* you a healthy dog, it certainly increases your chances of getting one
But that's just scratching the surface of the issue :( Many of the health problems associated with the boxer breed are genetic. If health testing isn't performed to remove affected or likely-to-be-affected dogs from the breeding gene pool, then those genetic conditions will be proliferated. The result is an ever-increasing incidence of genetic health problems, until such time that that's just what you get when you buy a boxer dog.
Now that doesn't mean that all BYB's are bad people. I'm sure many of them love the boxer breed and are simply ignorant of what they're doing to the breed by breeding untested dogs. But the bottom line is that if there were no market for their puppies, they'd stop producing them

There's no shortage of people who want to breed their dogs - but very, very few who want to be stuck with 10 puppies...
So there's two reasons not to buy a puppy from a BYB. The risk of the pup having (serious and expensive) health problems is far greater and the purchase of such a pup is a contribution (albeit indirect) to the decline of the boxer breed as a whole.