I strated to notice a strange behaviour among my chickens,one of them suddenly starts crying and then scratches his back of the neck aggressively with his eyes closed and falls on his back,this thing happens periodically like a crisis.And another chicken is crying when I touch him,this one was the last one to hatch,and I intervened to help him hatch after 24 hours of not being able to do it.And he usually doesn't seem to realise the world around him.Please help me!