Invariably, this is the dog the trainers keep a cautious eyes on.

And turned back to his beer, with one cautious eye on the proceedings.

Keeping a cautious eye on the wicked bill, I did so.

She found herself staring at them both with interest, and a cautious eye.

At times, he turned a cautious eye toward the cottages.

He looked her directly in the eye, his own eyes cool and cautious.

Here a door opened and a cautious eye peeped out.

She waited impatiently, keeping a cautious eye on the street.

I expect it to open a crack, cautious eyes peering out from behind a security chain.

His broken nose, those cautious eyes that had always looked at her so sadly.