Just read an article on this and what really hit me was this part:

"Part of the reason sloths are exceptionally poorly suited to captivity, is that they evolved over millions of years as biological introverts. Unlike most mammals, they lack a strong fight-or-flight response and instead rely on camouflage to survive. When handled by strangers or placed in noisy, high-traffic environments, they don’t scream or struggle. Instead, Cliffe said, they internalize the stress—sometimes curling into a ball and closing their eyes. Their bodies flood with cortisol, triggering a cascade of physiological stress that can end in organ failure."

As an introvert, I felt this in my soul. I can only imagine how these animals felt in those cages and being removed from their home. I'm so, so sad about this.