Before you begin, make sure your Doggy has discovered the very first Cross Your Paw trick (url is below.) Then teach her to carry out the Double-Cross exactly the same way you taught the Cross Paw trick, this time using the other paw. Your Pet will probably understand this trick https://medium.com/@tinypigletpublishing/how-to-teach-a-dog-to-roll-over-f176075b056f