First question...where is the vent?? My chicken has two holes in its rear end, one for poop, and the other for who know's what (probably for pee) Anyway, is the bottom/lower hole the vent? If it isn't what is it? My chick's bottom hole is crusty, white, and dry. it has something blocking it, I'm sure. Also, he is constantly making diarrhea. Info about him (if it helps): Age: 4 days old Breed:White leghorn Location:In the brooder. Gender: unknown (I just call it a he) What is wrong with my chick?