Today my Bantam Roos Comb started to darken and tip to one side. He also seemed a lot slower today. He's still eating and drinking but just moves a lot slower than he normally does. He also didn't crow today. Yesterday his comb was bright red, today it's much darker and more tipped to one side more than normal. He's just started crowing 3 weeks ago. Does darkening of the comb and tipping mean he's sick? if yes what sickness? cure? Any advice would be great. Thanks!!