You wait & wait for hours in the humid shower room and your starting to get thirsty, you don't have any water bottles on you but you're in a bathroom, it should be easy to get clean water. You turn the facet on the sink and rusty brown water comes out. Not willing to drink it, you try the shower and the same happens. You don't think you should drink it but your running out of options. Then you realize something, the toilet! You glance over and even though the toilets filthy, the water itself is fairly clean. You don't want to, but you're slowly gonna get dehydrated if you keep waiting.
You dip your face into the toilet & start drinking. It feels so refreshing! You start feeling strange as you drink though. You stop and look at your hands, they're covered in fur you take off your shirt & sure enough so is the rest of your body! You start feeling more changes happen, your legs become more canine. You kick your shoes to see your feet have turned into giant paws, but still manage to keep your body up on 2 legs. A tail pokes out just above your belt, causing a tight feeling on your waist, forcing you to drop your pants to let it free and expose your newly sheathed cock. Finally your face starts changing pushing out into a snout, you ears move to the top of your head & you feel your senses run wild. You feel the changes stop. You spot a mirror just above the sink. You try to move toward it but find yourself having difficulty walking, but you quickly adapt after falling over a couple times. Finally you manage to get to the mirror. Looking into it, you confirm your suspicions. Your no longer human, you're a dog. More specifically you're an anthro german shepherd.