What is a command you accidentally taught your pet?
My goldendoodle puppy doesn't ever want to come back inside. I told my beagle "go get your sister" as I tried rounding up the puppy. Now when I say "go get your sister" the beagle runs to the puppy and baits her into chasing him into the house.
She will put her head through any circle if she thinks I want her to, because I would always get annoyed at her when she wiggled too much trying to get her harness on as a puppy.