So, it's not much of a hint, but it helps me sometimes. I have a pack of about 4 wolves. They are all 20-30 levels. So when I find a strong animal like a bear, croc, or a pack of wolves, and when they come to attack you, fight as hard as you can. If you have your healer with you, and it has at least level 2 kill healing, press the healing button and attack. Once your wolf is near dying, switch your wolf. Keep doing that until your pack dies, or until the enemy dies.