White Fang – Jack London – Platanus Publishing

"They did not remain in one place, but travelled acrosscountry until they regained the Mackenzie River, down which they slowly went, leaving it often to hunt game along the small streams that entered it, but always returning to it again. Sometimes they chanced upon other wolves, usually in pairs; but there was no friendliness of intercourse displayed on either side, no gladness at meeting, no desire to return to the packformation. Several times they encountered solitary wolves.

These were always males, and they were pressingly insistent on joining with One Eye and his mate. This he resented, and when she stood shoulder to shoulder with him, bristling and showing her teeth, the aspiring solitary ones would back off, turn-tail, and continue on their lonely way."