beak mark

My lil pal has symmetrical stripes running down the sides of his beak that are grey and quite prominent. I know that some cockatiels have pink beaks and some have grey and i've heard some mutations can have just grey markings but I haven't come across any with such dark grey stripes like him. Is...

Hey Everyone, This ones a quick one! My baby cockatiel now 8 weeks old has developed a funny mark on the front of her/his beak. It wasnt there when we first got her and doesnt come off to my knowledge (ive tried to get it off, but not that hard as i didnt want to stress the bub out). Ive...