Police dogs that sniff for drugs may soon find themselves out of a job.

She had met every challenge and was sniffing for a real fight.

I came out at the fourth floor sniffing for air.

"They've been sniffing for two days, and just now are beginning to cough."

He sniffed it a few more times for good measure.

It sniffed around the floor for a moment, then disappeared down a hole in the far wall.

He went back to the house, sniffing for steak and onions again.

He sniffed the air for the smell of salt and took the fork to the east.

I took it and opened the covering to sniff for myself.

Sometimes the men came around at night, sniffing for Sheila, and they had to be scared off.