I like the look of natural branches for some roosts in my run. I found some nice hardwood branches while foraging in the woods behind my house. They are about 3" diameter and long so I can cut to size. My question is this - some of them have moss and lichens on them. Would these be safe for the chickens or would it be better if I scrubbed them off with a stiff brush. I know chickens will eat just about anything, but I don't want to accidentally give them something that would be toxic. Any advice?