Since this has happened before, I'm wondering if there isn't something stressing your animals way out. Although reptiles are famous for being able to slow their metabolism down to the point that they can go long periods without breathing, this is starting to sound like extreme exhaustion. If your setup is down low or by a table or something, maybe a dog or cat (I vote for the cat) is getting up next to the cage when no one is around and stressing the WD's to the point of torment. Cats and herps don't mix. Domestic cats kill reptiles and are one of the few animals that kill for pleasure. When I lived in Florida, it wasn't uncommon to see a cat stroll by casually with a fresh killed green or brown anole hanging out of it's mouth. I never saw one eat their prey, however. If they can't kill, they torment as long as it doesn't mean any harm to them. Except for rats and humans, no other animal can decimate entire ecosystems faster than domestic cats because of their intelligent and stealthy nature. If this could possibly apply to you in anyway, I suggest that you move your cage to an area where the cat can never be in sight of the lizards...even if it means behind a closed door.