How to Train a Dog to Fetch Slippers?

Tie the dog’s favorite toy to a slipper to catch its attention, then throw it. When the dog brings back the toy, it brings the slipper too; reward a snack.

After repeats, remove the toy and throw the slipper alone with the ‘slipper’ command, rewarding each return. Once it fetches one, try two slippers and reward when both are retrieved.