This is not saying wolves should not attack players or tamed animals on sight, just not other wild animals.
Have it so wolves will attack and eat other wild animals only when their hunger level is below 2/3
The issue is on certain islands where there are not many spawns capable of killing a wolf wolves will hunt and kill all other animals until all the animals are rolled as wolves so that the island is full of wolf packs and not much else. This would go a long way to solving that issue