That is a really good idea about grinding it up. Definitely for the rooster if we get one and do not want to keep him. I heard rooster rainbow dixies can get really big.
They get large, but you would find them the sweetest kindest bird there is. For their size you would think they would rule the coop, but they don’t. They are so mild tempered the smallest bird intimidates them. But they do like to sit by your feet or to be held.