'Congratulations, by finding and opening this this unremarkable brown cardboard box, you have become the proud owner the Furry Transformation Ray Gun, one per-customer, one per-universe.
The settings are quite user friendly. Adjust for the animal species you want. And those this ray gun is used on will become "busty" or "adorable" (as per the setting) furry nude animal girls (species of your choice) who love you unconditionally and whose greatest desire is to see your needs and wants fulfilled. (Maid uniform toggle available). This does not include sexual favors.
There is no reverse button.
Be on the look out for 'cosmic tough guys', and other such individuals who have a habit of spontaneous materializing out of thin air, who are always smarter, stronger, faster, and better at rhetoric than you, who exist purely to punish you for using this device. Sometimes they appear, sometimes they don't.
Also included is your free user license, declaring you to be the one true master of this ray gun and can't be used on.
Perception filter also available to ensure people who see your growing collection of willing servants do not find it too strange or usual.
Reality distortion field also available (in beta).'
Curious if it works, you use it on the mailman outside. In a flash, his clothes vanish, and his figure becomes that of a super model with breasts that pressed against each other, orange fur covered her entire body except for white front and black 'socks' and 'gloves' fur. Her feet became digigrated, a large fox tail grew from her rear and her ears moved to the top of her head and became pointed and a large muzzle formed on her face as her eyes became lupine. She still had her mail bag. Her ID badge now gave a female name.
"How many serve you master?" She asked.
"Uh... just continue on your regular job for now." You stutter.
"Alright master, if you need me, I'll be here tomorrow as normal." She bows, and gets back in the mail van, and puts on her hat so she's in uniform, (which has holes for her ears) and drives off. Wow. It works.