I am baking cupcakes for my Yorkie's birthday tomorrow and have to use soy milk and soy margarine because some of my guests are lactose intolerant. So I was wondering can my Yorkie eat it? I made one for him without sugar and was thinking of putting some strawberry yogurt on top instead of frosting. The other ingredients are: flour, baking powder, vanilla, and eggs. Is that safe for Yorkie tummies?