Okay, background. So my coworker had some silkie mixes and he's selling his house. So, I said I'd take the chickens. Fast forward to the next weekend, he drops off two roosters. Straight away I noticed that one of them has a very large comb and it's completely flopped down over his right eye. He eats fine, drinks fine, is a lively little guy, he just can't see on that side. As far as I know, they're only about 8 months old, I was told they were silkies, but they definitely don't look 100% silkie to me. My coworker only fed cracked corn, if that helps.