BYB'ers aren't all bad ... By healthy I mean that the pups/mom seem to be in good shape, good weight, shiny coats, not mangy or thin.
My first Chow was from a BYB. They had dogs from decent lines, but did not health test. He had horrible hips, which he had surgery for. He blew out a knee (which he had surgery for) and he was allergic to everything green (which we managed by keeping him away from all things green). To look at him, he was in wonderful coat and condition. Even seein him walk around, you'd not know he had any issues since we fixed them.
To continue, my Grimm was in fabulous body condition..even when an autoimmune disease was taking him from us.
And Julian, who should be the poster dog for BYB, is in fine coat condition (except right now, because sometimes you need a haircut) and he's a little turd..physically and behaviorally.
There is not a single thing you can tell about those pups from a photo, except that, yep,those are Mastiff mixes.
I'm not certain that you are grasping what a BYB actually is... most BYBs don't have their starving dogs caged in a shed, covered in filth and grime.