The purple spray is gentian violet, sold as BluKote at feed stores or TSC. It treats the wounds as well as discourages picking.
Scroll down here for links to threads about pecking/feather picking:
https://www.backyardchickens.com/forum/viewtopic.php?pid=1198
Scroll down here for links to threads about pecking/feather picking:
https://www.backyardchickens.com/forum/viewtopic.php?pid=1198
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