After trying DE,poultry sprays,invermectin none of that works. But this does
http://www.petco.com/product/102342...x?CoreCat=LN_BirdSupplies_Parakeet_HealthCare
I have a amberlink hen that had a bad case of it been spraying that every other day and after a year of no feathers she has pins on her back. Her progress can be seen here
https://www.facebook.com/media/set/?set=a.613769928653308.1073741831.505948632768772&type=3
http://www.petco.com/product/102342...x?CoreCat=LN_BirdSupplies_Parakeet_HealthCare
I have a amberlink hen that had a bad case of it been spraying that every other day and after a year of no feathers she has pins on her back. Her progress can be seen here
https://www.facebook.com/media/set/?set=a.613769928653308.1073741831.505948632768772&type=3