Your fearsome rage spurs your animal companion to greater heights.
Prerequisites: Handle Animal 4 ranks, animal companion class feature, rage class feature.
Benefit: When you rage, your animal companion gains the same benefits and penalties from your rage that you do, but only if it is within 5 feet of you. The companion’s rage ends when your rage ends, or as soon as you are no longer within 5 feet of your companion.
Source: Races of the Wild, page 152.