Maybe you punishment should be being treated like a human being on a "pet day"... so that you can spend all day being responsible for yourself when you are aching to be a pet.

Then you may remember to diffentiate between the two roles.

Also... perhaps you aren't playing the role of pet well enough and require some "intense" training. A "muzzle" will help you to keep your tongue to yourself when you're a pet. Are you a feline or a canine.... perhaps a duck? Appropriate food and toilet training, depending on what kind of animal is in order. (Cat box, newspapers in the utility room, or just anywhere in your cage; depending on which kind of pet.)

In other words, until you learn to "play" the role, you will have to "be" the role... so you know your place within the role.