Hand on heart, can anyone on here honestly say that they could not fly a pigeon without the use of a certain supplement/product? If you think about it, you probably use different ones every year, this tells me that you aren't convinced of any benefits in the product you've been using. Try a section of your birds with no supplements and im positive you wont see a bit of difference. I was a big believer in natural products, vinegar, salt, sugar, garlic etc but I even cut them out last year and scored in most nationals. The funny thing about the pigeon game is, it doesn't matter what you say, most wont believe you anyway lol.ps. The guy that convinced me not to use any products was a top Solway fancier.