I noticed these little bugs everywhere in the coop in broad daylight. They don't appear to be on the chickens. I have checked the chickens several times. We have seven pens and changed out the bedding on the roosts last week. The bugs are heavily concentrated in the coops with new bedding. They have also spread to the outside of the feed containers outside of the pens. They also randomly hitch a ride and will leave a small bite on my torso and ankles. What are these?