Dear Granny, I also have a mentally challenged gay Polish Rooster. He showed up at my coop with a little Aracauna hen wanting in with the big guys. (Stray chickens.... Who knew?) I thought surely they were some kids 4H project that escaped but no one ever claimed them. I've since decided that someone just got tired of dealing with them and turned them loose. The little Aracauna hen is smart and has turned out to be a good layer of small blue eggs but is a very disagreeable little biddy, the Polish is just almost too stupid to live. He stands in the corner and talks to himself, is afraid of the hens (and everything else for that matter) and is terrified of crickets. Ya think it is all the feathers growing from the head?
A lot of times the head dress does cause issues - the impairment of sight can create a fearful nature/high startle reflex as well as invite undesirable attention from others (thus furthering the fearful nature) and it can also impair their ability to see and get their fair share of food.