I have recently bought several white silkies, two of which I plan to show. I have read that corn can cause yellowing in white birds? Can someone tell me what is the best quality feed that I can give them to keep them healthy and white? I have been mixing my own feed for them but it does contain some corn, I can't tell that they are discoloring, but I have only had them for a month or so. Pics. added for Kim!!! Cute, huh?