You choose Wolfish Water. The hotdog salesman reaches in and hands you a bottle filled with a clear liquid like you would find at the store filled with natural spring water.
Since this is an evil hotdog salesman of course it is no ordinary water. You quickly guzzle down the water. Immediately after you drink the water you fart and a tail slowly forms at your rear end. The changes start to happen faster as you begin to fart and burp more frequently and slowly start turning into a wolf morph.
After your tail finishes forming grey fur starts to sprout from your skin and quickly cover you body. Then your ears start to move to the top of your head and become pointed. Lastly you finish the morph with your face becoming muzzle after a really loud fart!