So he stood until he was sure of himself, then he swung his huge shoulders around and descended two yards down the slope, swinging his head slowly from right to left, and sniffing.

The scent grew stronger.

Another two yards down the slope he found it very strong under a rock.

It was a big rock, and weighed probably two hundred pounds.

Thor dragged it aside with his one right hand as if it were no more than a pebble.
Instantly there was a wild and protesting chatter, and a tiny striped rock-rabbit, very much like a chipmunk, darted away just as Thor's left hand came down with a smash that would have broken the neck of a caribou.
It was not the scent of the rock-rabbit, but the savour of what the rock-rabbit had stored under the stone that had attracted Thor.