How would you do so, such isn't even possible irl?
Maybe it’s just one more reason to think carefully before using the powder… It’s up to your imagination what “remove” means here (take it to an animal shelter, release it somewhere, give it to someone else, or put it to sleep…) Maybe it should be more of a “Lassie” option—the animal gets so homesick that it finds its way back to the farm after a while. Children turned into doves might also show up at the farm every now and then, if there’s a birdhouse there...