My girls are about two weeks old. They've been very friendly and very social with me. Yesterday they were all huddled away from the heat lamp so I figured they were getting too warm so I moved the lamp up, but now they're still acting skittish, huddled tightly together some burrowing under the others and getting as far from me as possible. I didn't hurt or scare them that I know of. Any thoughts? All 9 of them were fine being spread out throughout the brooder but now the practically move as a unit.