Clukcluks
Songster
When would you use this product 



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Never, for me. They already have this stuff in their Kalmbach feed, plus they “yard-range.”
Hello Buckeye Amy.I wouldn't. Anyone can marketsnake oilstuff like this and make a buck off people who don't know any better.
Feed your birds a quality diet, provide fresh, clean water, a safe place to forage, lay eggs and sleep. Nature will take care of the immune system by exposure to their surroundings. I recommend free ranging, too.