Hi I'm new and was wondering if y'all could help me. One of our chickens doesn't have any balance and keeps falling over. He falls over the water bucket and over chickens so I'm guessing it's gotta hurt. He's about 4 years old. We feed him scratch, grains, whole corn, and let him roam around. He's eating but he can't seem to stand. He just lays on his side with his mouth open.