It is blatent snobbery to use that expression for every problem dog that is mentioned on these boards.
I don't think people are doing that.
There are behavioral problems which ARE due to poor breeding practices. At least in goldens.
I referred to bad breeders as far as shih-tsus in response to somebody else's post about a dog being nasty and mean. If these dogs are mean, aggressive, snappy - that is probably a combination of handling and breeding. All of the shi's I've met (dog class + they are just a very popular dog with a lot of barn people) are awesome dogs.
This is their breed standard: As the sole purpose of the Shih Tzu is that of a companion and house pet, it is essential that its temperament be outgoing, happy, affectionate, friendly and trusting towards all.
Our PoopZoo was from a leading breeder. In 1983 we paid nearly $2000 for the puppy. Breeder had BIB awards from one end of the country to the other, including Westminster. BIS for every major show with the exception of Westminster. So your off hand comment that "bad breeder" is the reason is wrong.
Are you talking about accidents?
That is generally due to the owners in some way or other, not the breeders. Small dogs have small bladders.
I do know of small breeds of all kinds who will leak a little bit out of excitement. That happens and you can't yell at these dogs for having an accident like that. For that matter, I've seen goldens have similar "excitement piddles".
Having poop and pee accidents, that to me likely stems from the owners being lax in some way in assuming their little dog is housetrained before it actually is. It takes a LONG time before some little dogs are thoroughly housetrained. You have to understand that and not take it out on the dog.
Again, get the kids a good old beagle pup from a breeder that supplies hunters. Study all the training materials for the breed BEFORE getting the puppy so you can hit the ground running. Do not overfeed, they get fat easily and quickly. teach to run on a tread mill for those days you can't get out for a run with "Snoopy". Never let out off the lead. except in the fenced back yard. Full "hunter" style collar name plate. Because someday, the kids WILL forget and let him out.
Beagles get fat because their owners just keep them in the backyards when these dogs were bred to work. If you have a daily walk routine, that should be fine. <- My neighbors walk their beagles every day and their dogs are perfect.
They need microchips and obedience training. And beagles will run through invisible fencing.