First time chick owner… I got six baby chicks no more than a few days old yesterday and noticed one of my sapphire gems but had a bunch of Hard dried poop stuck to his rear end. I took a warm washcloth and some soap and gently removed the dried Poo, And realized his vent seems protruding? My other five chicks rear ends are completely fluffed covered without a protruding vent. My little guy is also missing a bunch of rear end feathers, possibly from him pecking at it. He is my smallest chick, but seems to be eating just fine and moving around well like the others. Any advice or info would be appreciated, thank you so much!