i just got 4 baby chicks that are about a week old. one of the smaller ones has pasty butt so i have been cleaning the best i can. this morning i cleaned it and he pooped all over me right after. tonight he is laying down a lot almost as if he just is too weak to stand. but he can walk and is still eating and drinking. what else can i do besides keep his bottom as clean as possible?? the other three seem perfectly fine and walk around all day, but this one just stays to itself and just seems sick. please help.