Your bond with your companion or familiar is unusually close.
Prerequisite(s): Companion (Animal, Mount, Automaton, Bone Commander, etc.) class feature or familiar class feature (or feat).
BENEFIT
The abilities of your companion or familiar are calculated as though your class were 4 levels higher, to a maximum effective class level from where you get your companion or familiar from equal to your character level. If you have more than one companion or familiar, choose one to receive this benefit. If you dismiss or lose a companion or familiar that has received this benefit, you can apply this feat to the replacement creature.
Special: You can select this feat more than once. The effects do not stack. Each time you take the feat, it applies to a different animal companion or familiar.