Hello ~ I have a friend who has a hen in his flock who is not well. Her legs have gone a bit white and scaly and her vent had slight stick butt, which we gently cleaned with warm papertowels. His biggest worry is that just below her vent, it is dark purple (almost blackish) and swollen looking. Almost what you would picture a cancerous growth to look like. She does not roost at night and is becoming ungroomed. Her eating and drinking is also off. Any ideas?