This was done by "again"  painterkirby x3 Mentioned in my profile Ive stated I love getting transformed. In particular I have a running roleplay with  TriggerNyar where in our "fur world" I own a black leather collar that Trigger made for me due to my love of reptiles.

The collar is strapped onto its victim and has a latched piece that seals shut after its put on, the user setting dials for "time spent in form" and hitting the activation switch then the collar releases magic into the victims body slowly altering their DNA to that of a Monitor Lizard while retaining the persons mind. Once the person is fully transformed they are indistinguishable from a normal animal of the same type. The collar then seals their voice so they cant talk, and only the person who put the collar on or its creator (Trigger) can remove it.

So in this case it seems I was given the collar to wear, shrunk out of my clothes and turned into Trigger's pet lizard until he takes it off. He needs to take care of me now, feed me, clean me, keep me warm and all that..but I don't mind <3 The simplicity of pet life is worth losing my body for.