GUYS YOU CAN GET THE WYVERN TO GROW UP WITHOUT USING WYVERN MILK, you just have to but the "less hungry baby" thing which is like 10 keys, so u don't really have to get wyvern milk, and in the imprinting part if the wyvern ask for *wyvern milk* just cryo un cryo it and 9/10 times it'll change. IMPORTANT this is on ark ultimate mobile edition