You don't even have to snarl a command; your pack member takes your meaning from your bloody fangs.

Encounter   ✦     Beast Form, Implement, Primal
Standard Action      Melee touch

Target: One creature

Attack: Wisdom vs. Reflex

Hit: 2d8 + Wisdom modifier damage, and you command one of your summoned creatures to make one of its standard action attacks. If you don't have a summoned creature present, roll a d20. If you roll 10 or higher, one ally within 5 squares of you can charge or make a basic attack as a free action.

Published in Primal Power, page(s) 55.