They have gumtree branches in their cages.
I miraculously measures, the boy who's nails are really bad this morning, they are 4cm long and growing straight down and are sort of curling :/
One of the girls, her nails are growing around and back up nearly into her foot, so I am going to do hers aswell, to prevent anything serious.
The rest seem to be fine though.
As far as crustiness goes, they are looking better today!
Although cloud has some sort of staining around his beak and on top of his cere :/ It looks like blood, but now of the feathers are damaged and he isn't moulting as far as I can tell..
I'll get a photo..