This has been bothering me for over a year. I found a reference to this word from this source: http://www.dict.org/bin/Dict. Definition three (listed below) has a supposed quote from Kipling, although I have searched all online references of Kipling's works and cannot find the source. Has anyone ever seen another reference to this word? Does anyone know what it means? I am assuming it is some sort of animal, but searches through biological and mythological dictionaries have come up empty.

From Webster's Revised Unabridged Dictionary (1913) :

Mill \Mill\, v. i.

1. To undergo hulling, as maize.

2. To move in a circle, as cattle upon a plain.

The deer and the pig and the nilghar were milling round and round in a circle of eight or ten miles radius. --Kipling.

3. To swim suddenly in a new direction; -- said of whales.

4. To take part in a mill; to box. [Cant]