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.
My cat loves riding around on my shoulder, and also loves food. He figured out that he has a better than average chance of getting treats after a shoulder ride. The counter in the bathroom is the highest in the house, where he can get the closest to my shoulder. So I apparently taught my cat to come running when he hears the toilet seat go up. Does it every. Single. Time.