This month celebrates my first year of raising chickens. I have 7 hens and boy was I excited that they all made it through the cold Chicago winter. However, in the past few weeks one of my hens had a run in with an opossum which was bad enough but ended up with a hole in her head the size of a quarter from being pecked by her friends. I isolated her and she has healed quite nicely. Then 2 weeks ago I discovered my Polish hen had scaly mites. She has also been isolated and all the hens are getting slathered with Vaseline every couple days. Then yesterday I saw 3 red and bare bottoms in the coop. The Barred Rock hen was the only one that I actually saw bugs crawling on. They are very tiny white parasites around her vent. Are these lice or mites and what can I do about them? They have a dust bath area of DE, wood ash and sand. Obviously this did not prevent an infestation. Any help will be appreciated.