Just Cat breeding?
It's a mistake for every pet.
It used to be that breeding was all about producing healthy animals with better traits than their predecessors. Now you have English bulldogs literally incapable of breeding without help. Literal genetic dead ends.
Posh cunts have overtaken it and made it about purposefully inbreeding defective traits in the animals purely for "aesthetics" and you end up with fucked up animals.
I mean, look at pugs: their snouts that look like they took a hammer to the face give them chronic breathing problems making them constantly sound awful and causing them to be sedentary animals because they get out of breath easy, on top of that their eyes are too big and coupled with their flat snout, makes them susceptible to getting damaged, and that isn't counting the potential of them popping out every time the animal sneezes, their legs are too stumpy for their bodies so pugs won't move much, because on top the breathing problems, walking causes them physical pain after a hot minute, also the curled tail is a danger as it has a tendency to easily break and permanently paralyze the animal.