This is a great thread. 
Way too much hype and and lack on actual scientific proof that anything other than properly providing balanced nutrition and fresh water helps Birds.
I've not used AVC, DE, yogurt or any other thing so readily pushed on birds. Then their is the niacin and B complex being pushed too.
I'm a firm believer that if fed properly from the start Birds don't suffer all the ailments in the first place..

Way too much hype and and lack on actual scientific proof that anything other than properly providing balanced nutrition and fresh water helps Birds.
I've not used AVC, DE, yogurt or any other thing so readily pushed on birds. Then their is the niacin and B complex being pushed too.
I'm a firm believer that if fed properly from the start Birds don't suffer all the ailments in the first place..
