Star Trek: Deep Space Nine1993

Taya:
...Then the Great Minra said to the evil changeling, "Maybe you can turn into a mountain, or a Ghergher Beast, or a tornado. Those are big things, and big things are easy. I bet you can't turn into something small - like a loaf of greenbread." And the changeling said, "Yes I can", and he did. And do you know what happened?

Odo:
The Great Minra gobbled him up.

Taya:
How'd you know that?

Odo:
The changeling in your story wasn't very smart.

Taya:
[shrewdly] Could you turn into a loaf of greenbread?

Odo:
I suppose I could.

Taya:
Show me.

Odo:
And let you gobble me up? I don't think so!