It nibbles its way out.

Somewhere, imperceptibly,

A cheek shivers, a jowl wobbles.

The teeth are gnawing

Juicing tearing

Rabid, driven;

It gets through.

Peeks its snout out,

Sniffs, darts a glance around,

Scuttles again.

I particularly dislike it when it comes back to me, with an air of relish,

As though I hadn't told it in the first place.