Being a reptile/exotics person I've encountered my fait share of horrors (because it seems they're particularly at risk for maltreatment).
Other than the usual pet store bullshit, I know many rescued animals, including a boa who was burned so badly by hot rocks he still has issues (just had another surgery a couple months ago actually), a ball python who survived a hoarding situation and has some scarring from being given live feeders (he also is afraid of anything that resembles a live rodent), a beardie who had goddamn cigarettes put out on her, and more.
I actually reported a local pet store and took pics of some of the terrible conditions a couple months ago. I'm not sure what happened about the report, though I've heard the store is on its way out so it sounds like they've got some heat on them. I also know an ex-Petland employee who basically said all the horror stories about petland are true (and employees even have to sign a waver that they won't tell the truth to others lest they be fired).
One issue that really rustles my jimmies is venomoid snakes. Basically, venomous snakes with their fangs/venom glands/etc removed. Not only can that shit grow back, its also a horrendously invasive procedure that's often done in unsanitary conditions without proper anesthesia. I'be heard most venomoid snakes die within a year, many due to stress alone.
I think the most disturbing venomoid horrors I've heard about were green mambas who where forced to bit down on cloth that was then ripped out in a crude defanging attempt. They had horrendous injuries like broken jaws and what not, and were in so much pain they required a ridiculous amount of pain medicine to get them to settle down. I don't know how many, if any eventually recovered. I also saw a pic someone took at a show of this beautiful white cobra just thrown in the trash, apparently a venomoid snake who died from stress.
And while its not really a pet thing, there's also rattlesnake roundups, which are mind boggling levels of horrible.
EDIT: there's also the people out there who are essentially ball python millers, who breed snakes even if they're unhealthy or deformed because they just care about making as many snakes as possible. And people who starve large constrictors in an attempt the make them smaller (which works because the snakes are malnourished). Also heard about a guy who brought a pygmy rattlesnake to an event who was striking the glass (something that they can get seriously injured or killed from, and also a blatant sign the snake is stressed and afraid and needs some quite time) that he did nothing about, even being entertained by it and showing it off to the crowd.
God, I know way to many horror stories
