One of my young Guineas is ill. He/she was just lying in the sun while his siblings were playing. When he ran, he kept flipping over like he was out of balance and he is very hot and keeps falling asleep in my hands. He's not tame at all, so this shouldn't happen. He's inside now, in a small crate. His crop is very full, so we're going to give him a little bit of anti-biotic with some olive oil. Is that right? What else should I do and does anyone know what's wrong with him?