I have a 2 year old Cinnamon Queen who has just been sitting around the past couple of days. She is normally at the top of the pecking order and almost always is one of the first out the door in the morning, first to greet me at the gate, last to go in the house at night, etc. But recently she has been moving very slowly, if she is moving at all, and she is more hunched over than usual. She spends most of her time just sitting against the wall of the house, when usually she is always running around. Today I saw a younger chicken take a chunk of apple from right under her beak - usually she would never let that happen. She doesn't fight at all when I pick her up. She is eating, but she just doesn't seem to have much energy at all. What should I do?