We might never know what is currently in use, but I'm convinced that any wild and wacky idea has been tried by somebody. Some fun ones off the top of my head:
Olga answered that the murder of the messengers sent to Kiev, as well as the events of the feast night, had been enough for her. She then asked them for a small request: "Give me three pigeons...and three sparrows from each house."[15] The Drevlians rejoiced at the prospect of the siege ending for so small a price, and did as she asked.
Olga then instructed her army to attach a piece of sulphur bound with small pieces of cloth to each bird. At nightfall, Olga told her soldiers to set the pieces aflame and release the birds. They returned to their nests within the city, which subsequently set the city ablaze.
- Meet Wojtek the bear: https://en.wikipedia.org/wiki/Wojtek_(bear)
- AT-Dogs: https://en.wikipedia.org/wiki/Anti-tank_dog
- Ships made of ice and saw dust: https://en.wikipedia.org/wiki/Project_Habakkuk
- Funny tanks: https://en.wikipedia.org/wiki/Hobart%27s_Funnies
- Pink camouflage: https://en.wikipedia.org/wiki/Mountbatten_pink
- Gay Bomb: https://en.wikipedia.org/wiki/Gay_bomb
- LSD Trials: https://www.youtube.com/watch?v=ziqpwkhqTRs
- Portable nuclear launcher: https://en.wikipedia.org/wiki/Davy_Crockett_(nuclear_device)
Also dogs don't need to attach handcuffs, it suffices that they chomp on your leg. And that they can be trained for easily enough.