He poured out two glasses and cautiously sniffed at both of them.

I remember sniffing cautiously, as if I still had gas on the mind.

The 'bot rolled up to one of the four chairs and sniffed at it cautiously.

He sank to his knees again and cautiously sniffed at the hole.

She sniffed cautiously at the base of the pitcher she'd been stacking the other pieces in.

He thrust his head into the sphere and sniffed cautiously.

Jennifer sniffed cautiously; there was an off smell coming from somewhere.

The latter two men looked up, sniffed cautiously at the bottle.

He took a pinch, sniffed at it cautiously, then grimaced.

He examined it, sniffed cautiously, and his expression became even more implacable.