@Messyhair321 you are incorrect.
Certain varieties or breeds of pretty much all domestic or exotic species are in an overbreeding crisis, with species specific rescues overflowing with unwanted animals & the traits that have been bred for causing significant welfare concerns.
In cats it's breeds like sphynx, persians, folds & the various dwarfs.
In rabbits it's lops, lionlops, lionheads & dwarfs.
In guinea pigs it's skinny pigs.
In herps it's rare morphs, some of which cause neuroligcal issues.
In fish it's fancy goldfish, in particular celestial & bubble eye goldfish.
In birds it's various colour & feather mutations, particularly prominent in the world of fancy pigeons, with fanciers breeding for neurological issues in certain breeds.
In 'pet' livestock it's 'micro pigs'.
In equines it's halter bred horses- basically horses bred purely for showing & are physiologically unfit to be ridden or worked.
And of course the many, many issues with breeding dogs with extreme features.