Solas, the wise and intelligent mage of your party, forgot to close his tent before going to sleep. Since you're in the Arbor Wilds there are a lot of critters that roam through the night and some of those critters are cold. That's why he's covered in little lizards, totally not because Cole fed them the other night before he went to bed. Okay, it's both Cole's and Solas' fault that Solas is now covered in lizards, but you can't blame the little guys for wanting to warm spot to sleep after food.