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:

- 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.