My 7 day old Buff Orp chicks have started to spend a lot of time resting. The first 5 days they were busy running around in the brooder. Now they spend lots of time near or under the lamp lying down but with their heads up looking around. They look healthy but seem lazy compared to the first 5 days of their lives. The wing and tail feathers are developing well. They are growing bigger. They run over to the feed dish and eat whenever I top up with fresh feed. None have pasting. Judging from the feed that disappears when I am not there and the amount of poop on the bedding, they are clearly eating well. The temperature under the lamp is 95F. I am concerned about the abrupt change in behaviour. Is it normal for chicks to be resting so much?