I'm relatively new to the chicken world. I've only had my small backyard flock of 4 birds for a few weeks. Coming in to this I talked with a few folks to get information and advice and never got much sense of problems with fleas, lice, mites, or other health issues with birds. After reading on this site for a few weeks I'm getting kind of paranoid. Living in the cold northeast and with this small flock size, how worried do I need to be with this type of pest control? I'm reading a lot of people using DE as a preventative measure and it seems like there are lots of posts with people dealing with fleas/lice/mites. My goal is to keep these birds happy/healthy with as little non-natural intervention as possible. They're in a good clean, dry coop. I'd really like to not have to bring DE or any other preventative measure into the mix aside from general clean living conditions. However, I don't want to have sick, unhappy birds either. So, for those of you who have a small backyard flock like me should I be worried and more proactive with these types of pest situations? What would the primary cause of these types of ailments be - unsanitary coop conditions, mixing of new, previously infected birds? I welcome any advice or recommendations you may have.