The Call Of The Wild by Oliver Ho

Stolen from a comfortable home and thrust into the brutal world of Klondike sled teams, a powerful dog must learn to survive treacherous conditions, cruelty, and rival packs while discovering his own primal instincts. Bonded to a kind master yet increasingly drawn to the wilderness, he transforms through hardship and loyalty until the call of nature proves irresistible, leading him to a life beyond human ties.