How to Mark a Frog to Know if It's Our Frog

There were quite a bit of guys in there, but you never look a stump horse in the mouth. If there's a portal, I'd say we just drive this bad boy through. But I feel like if we just zoom through there, we might give away our position. So is there a way that we can mark the frog to know that it's our frog if it goes back into the real world and we find it again? Sure. Put one of your business cards in time. Do the orcs notice a frog falling out of the sky with Ron's business card on it?" "I'm going to wild shape once again into a bird. This time I'm going to be a