Improved Link (3.5e Feat)
From D&D Wiki
Share spells and feats with companion.
Prerequisite: Animal companion and character level 15 or higher.
Benefit: Allows the character and the animal companion to share feats and spells and spell like abilities.
Normal: animal companion as a free action, or push it as a move action, even if she doesn’t have any ranks in the Handle Animal skill. The druid gains a +4 circumstance bonus on all wild empathy checks and Handle Animal checks made regarding an animal companion.