Just got an ad in my e-mail today..I usually use Denagard twice a year as a cautionary dose, love it! But this stuff is chhttp://meyerhatchery.com/productinfo.a5w?cat_id=1027&category=Poultry%20Supplies&grd_prodone_filter=PRODUCT_ID%20%3D%20%27VRX%27&aid=119eaper! Wondered if it works?