:-/ I don't know.
This is my first batch, too.
They're vaxed, so I don't know what else to look for 
The only thing I've been consistently checking (and have fixed a few times) is that their vents are clogged.
One of my Welsummers was clogged a couple days in a row - each time I cleared her waste and put her back in the brooder, she did a little chick-shake and, er, voided quite a bit.
That's cleared up since I put a dab of apple cider vinegar in their water. Counterintuitively, it seems to have firmed up their poo and made it less likely to stick.