The Named, book 1: Ratha's Creature
Clare Bell2007

Ratha and her clan are the Named, a band of intelligent wild cats whose society is based on herding deer. The Named have laws, language, traditions, and leaders. They also have enemies. The predatory raiders of the un-Named are driving them close to the edge of survival. Then Ratha, a mere yearling, discovers what she calls the Red Tongue: fire. Her new weapon gives the Named a new defense, but it also rouses the ire of Meoran, the tyrannical clan leader. Soon Ratha finds herself in exile among the un-Named, but determined to survive.