Most of my chicks are 2.5 weeks old and some are doing a strange flappy thing down in the bottom of the brooder, in the shavings. Right now there's no diatomaceous earth in there yet because they are in the house and the last thing I need is MORE dust on top of the horrendous mess they're already making. Is that what they are doing already or is it too early for that behavior? Within the next week they'll be moved out to the coop with the brooder lamp so I can get the 15 messy girls out of the house; at that point should I provide some DE for them to bathe in inside the coop along with the shavings? THanks!