we are going to have tamable pet wolves! Yay!
but, why stop there? some (odd) people don't like dogs, but like cats. my suggestion: lynx
it would be similar to the wolf, but tamable with fish and string, as opposed to ham and bones
it would stay away from going in water.
you could not sick them on an mob by punching the mob like wolfs, but if you are attacked, they will fight back.
they would be able to climb log blocks