I'm sure she is. She's probably one of the most experienced of her clan, she fought with one of the pains when they attacked the village, why wouldn't she fight in the war?
People like the act like the whole inuzuka clan is fodder. They are mostly just tracking ninjas though, and are good for team situations where thier teamates can give them an opening so they can own whatever opponent they are fighting with gatsuuga.
Remember the move Kiba used against that sound 5 guy? That was a pretty beast move. I wish they showed more of him in the war, we should see some improvement from him.
BTW Kiba's mom is a badass. Her dog has a eyepatch. She has a pirate dog, badass.