Could the dog carry a child?
A creature with four feet had greater purchase of foothold than one with two.
"Roy," he said, "turn the cat off and put the Heir-to-Empire on the dog's back; he must be tired also." Mirak, nothing loath, climbed quickly to his mount; but ere he had settled himself on its back Tumbu had begun to sink slowly.

The little lad's weight was too much for even four feet; there was a struggle, over went the little Prince, and both he and Tumbu had to be picked up and set on their legs again on a fresh, unbroken place.
Foster-father looked in despair at Old Faithful, and for a minute no one said anything.

Then the old man's face lit up.

"Lo! I had forgotten it utterly, but the time and place bring memory back.

Firdoos Gita Makani--who knew all things under the sun--had a favourite horse, that strained itself falling into a drift.