I have a silver laced Wyndotte rooster that started acting sick a few days ago. Now, he is sitting on his roost looking all depressed. His comb and wattles aren't bright red anymore. They are more of a dark red or purplish and when he breathes in, he is opening his beak. I have noticed for a while now that his crowing has changed. The last part of the crow hasn't been coming out. Is it respiratory? Can I give him anything to make him better? Please help!!