I have a 4 week old ISA brown chick who doesn't seem to preen herself at all. I got her at 2 weeks old and when I brought her home I thought she was rather smelly so i gave her a bath and blow dry. She's now 4 weeks old and I've had to bath her again because her feather's looks so dirty and tatty. Once blow dried she looks beautiful and smells great. The other chick she shares with is immaculate so it can't be the living conditions. I've never ever seen her preen and her other 4 week old friend looks beautiful in comparison. Has anyone else had this issue? I've searched the web and can only find stuff about over preening and feather plucking.