Changing wolf skins/appearance

I think that you should be able to merge textures and looks of certain items in the game to wolves to make them look like your favorite block in the game. I don’t think these forms should have the right to be a spawn egg but you should be able to craft or summon them using the /summon command. For example, if you want a wolf to look like a watermelon, you get a wolf spawn egg and place it directly in the center of the crafting table and then place blocks around it, but either: 1. Watermelon blocks for the looks of the outside of a watermelon 2. Watermelon slices for the looks of the inside of a watermelon. If this already exists as a mod or an add-on, it should be transferred to the regular Minecraft world and improve the mod/add-on on whatever which way mojang and other people think is best.