Give Outlaw Red a chance. You'll either love it or hate it. I was fully prepared to deride it as a pale imitation of famous antecedents; the cover even looks like a rip-off from White Fang. Much to my astonishment, I enjoyed it; tried it with the class (11-12), and they lapped it up. Basically, the moral is simple. Survival. Survival of an Irish Setter in an intensely hostile environment: pursued by enemies from the animal and human world, suffering from cold and hunger, physical attacks. it's all there. Very readable.
Links:
[1] http://ww.booksforkeeps.co.uk/childrens-books/outlaw-red
[2] http://ww.booksforkeeps.co.uk/issue/6
[3] http://ww.booksforkeeps.co.uk/member/bill-boyle