A little over a week ago I took my 3 rhode Island Red chicks out side ( They were 3 weeks old) Suddenly one just took off running in fear. She tried to hide and ran into things. Then she would look as if she had no controle of her body. She would recover and when I put her back in the box she would be fine.She only does it when I take them outide. She is 5 weeks old now and she still does it. Does anyone know what could be wrong with her?