Control[] dogArray = Game.Game.Instance.ctrlNodes.selectState.
                                Select(x => x as Dog).
                                Where(x => x != null).
                                Select(x => x.dogObject.gameObject.GetComponent<Control>()).
                                Where(x => x != null).ToArray();
Control[] catArray = Game.Game.Instance.ctrlNodes.selectState.
                                Select(x => x as Cat).
                                Where(x => x != null).
                                Select(x => x.catObject.gameObject.GetComponent<Control>()).
                                Where(x => x != null).ToArray();
Control[] combArray = dogArray.Concat(catArray).ToArray();

foreach (Control n in combArray)
{
    //n.Roar();
}