I'm thinking that the security of being under something might be what they need when making the transition.
I like the idea of @Kassaundra 's feather dusters in the brooder. Then when they decide they don't need the heat, they can still hide under them until they feel more secure.
I like the idea of @Kassaundra 's feather dusters in the brooder. Then when they decide they don't need the heat, they can still hide under them until they feel more secure.