Hi, I am a new member. We have Free Range Chickens and 3-4month old Guineas. Our Guineas roam with our chickens and are the first to go back inside the chicken house in the evening. Within the last week, one if our Guinea keeps falling over on her side and will fight to get up on her feet for several minutes. She still runs with the other Guineas and Chickens and even our old English bulldog. She is still eating and drinking but continues to fall down several times a day. Does anyone know what would cause this? We live in Missouri.