I got 6 buff orphingtons this past Saturday. They are about a week old. 5 of them are doing great. Wide open trying to fly, eating drinking etc. One seems a little slower. She wants to stay under the mama's heating pad most of the time. She will come out and eat but I haven't seen her drink on her own. My daughter and I have given her some sugar water with a dropper and she will take a little. No pasty butt and is pooping fine. She's the one with her head down kinda in the middle to the back. Any idea what might be going on?