By all means treat now , with Permethrin dust. If the temperatures moderate in 10 days , re-treat with permethrin liquid, and spray your coops too.The bugs look for a warm body when it is cold.Only having had my BOs for 3 mo I didn't realize we could pre treat vs only treating when found. With the cold weather is the permetherin the best option? I'm worried now that I didn't pretreat thinking it was too cold for these nasty bugs![]()