my 6 new chicks are about 4 months old. i noticed one of them was starting to get a little cross beaked. i already have one stupid chicken with a cross beak. she never fully developed and doesn't lay eggs b/c of it. so i went to go trim this girl's beak. i made ONE clip on it about 1/16th of an inch and it was bleeding. i was very surprised. on my other cross beak, i have trimmed off that much several times and not gotten any bleeding.