You guys are insane! Hairy caterpillars have hair because it stings! Absolutely do not feed hairy caterpillars! I can't beleive what I'm hearing.... spiders are ok but NOT hairy caterpillers! Even nonhairy caterpillars often feed on poisonous plants. If you dont beleive me, pick the hairy caterpillar up, if it doesn't sting you immediately, then it's a species that has sliver in hairs and within a half hour you'll feel it and have a rash where each hair is stuck in your skin! Tweezers rarely work in removing them. Please don't do it! I breed moths but I won't ever touch hold or keep species with hair, my experiences as a child who thought if he held them carefully enough that I wouldn't get slivers are bad enough that I'll never deal with them again. Takes over a week for symptoms to subside.