[/IMG] Hello everyone, first off thank you for taking the time to read this post and share your opinion and experience. We have 2 black sex links whims but are raw and red. One of the girls are now starting to lose hair now up her back. Their stools are Normal, their vents are Norma their eating and drinking we even took them to the vet they didn't see any mites. They were like this at the age of 5 months and are now a year old. I'm just running out of possible guesses here. Their healthy birds they don't pick at it nor are the other girls Anyone have any opinions ? Thanks again!