Does that mean after I hit my shot on a Par 3, and a dog picks it up and puts it in the hole, it counts as a hole in one ?

Can my opponent do the same thing?

I think I might get a mate to come out with me at my next medal and I'll use him to get me 18 consecutive 'holes in one!'

Out of curiosity, this happened on the PGA Tour a few years back when a bird stole a player's ball of the green and dropped it into the water. Does this mean that the player had to go play from the drop zone?