Its not completely poor husbandry. Lots of breeders raise babies together especially in the first month or so. Even the some of the bigger companies.
These kind of injuries don't happen in the first month or so, as they can not bite very hard at this age. By the time their jaws are strong enough for serious biting they should have been seperated already!
Also at shows they put babies in the same enclosures to save room. If you have 200 babies for sale at a show you cant house them all seperate. This is just part of raising babies together. THings happen.
Well, I never go to shows with that many animals, usually not more then 50 pardalis. Everyone of them is sitting in his own little fauna-box under the table. I've got a special show-viv with six big chambers all decorated with life plants and just fill them up after selling a animal. This is a bit more work, sure, but it's much better for the animals. So it is possible, and for a good breeder (no matter how big),loosing tails in fights is defo not just part of raising babies together. You hear this all to often: I've got 200 babies, so no problem if some got peaces of their tail missing or if some die because of the stress at showes...Sorry but I hate this sort of thinking, makes me sick...