So true. They are on white pine shavings over sterilized play ground sand. The behavior has stopped. They are acting normally now. Must have been some kind of growing pains for a few of them. Now that I have seen and documented this behavior in my hatch journal, I will be aware with the next round of Catdance hatching. I plan on purchasing more eggs and eventually raising and breeding these birds together in color pens.I know she uses Pine shavings, so not that issue.