We have 4 Bantams and one suddenly got sick. It had bubbles coming out of its mouth and we wiped them away. I'm currently still with the chick but its extremely lethargic and occasional throws it head back like its drinking other times it'll suddenly get up and be fine and eat or drink something. It's no longer doing that though. I'm very concerned that it's not going to make it by the morning. How can I help it?