My Sylvie, SLW, will be 14 weeks old tomorrow and has had a "wicked" cross-beak from about week 2. She is slightly smaller than her roommates, but she's actually at the top of the pecking order. We have made some accommodations so that she can thrive... we give her wet mash in a deep dish, so that she can get a bigger mouth-full, and in this hot weather, she enjoys a slice of cold watermelon. Since she isn't able to peck at leaves and grass when the other girls are foraging, I chop up some kale or other greens and mix them into the wet mash just for her. One side-effect of eating wet and sticky food is that Sylvie often needs to wiped down, if not bathed, since she ends up wearing her food. But in all other ways, Sylvie is doing just as well as her peers. She just won't be sitting for any cover-girl portraits, but that's okay by us.....she's our most interesting character.