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.
Other way round actually, I mentioned this I another comment about my neighbour's geese
I pass them every day when I'm walking the dog and always give them dandelion leaves; it's basically goose-crack. They go nuts when they see me, and will even let me pat their heads
My wife mentioned one day that when she's walking the dog, if she passes the geese they go nuts and run up to the fence, honking like mad and it freaks her out.
Took us a few tries to figure out the geese think the dog is bringing the human with the dandelion leaves