As soon as the green light faded away, you started to not feel so well. You started having a stomach ache and you kneel to the ground. Gold fur started to sprout all over your body. Your hands and feet bursted out black and sharp claws, and it also grew black paw pads. A golden dog tail bursted out from your behind wagging. The fur reaches up your face, and your ears reshape into floppy dog ears, and your nose turns wet and black. Your nose and mouth push out together to form a dog's muzzle. Your tongue grew to fit this new appendage as well. Pain comes in your mouth when sharp canine teeth grew out from your mouth and your old human teeth fell to the ground, bleeding a bit from the pain. Whiskers grew on the sides of your muzzle as well. New instincts developed in your new form as well, making you more obedient.
The transformation is complete, you are now an anthro golden retriever dog.
As you exit out of the changing room, the zookeeper smiled and said "There you go! You're more obedient in your new form!"
The zookeeper demanded you to pick up the litter off the zoo grounds, and until then, he might change you back. You started to pick up the trash off the zoo grounds as the zookeeper said, sniffing leftover garbage that are hidden.