Yes it's okay.

Don't switch her back to kibble if she doesn't eat. If you do this will never work and you'll be creating a picky dog. If she doesn't want it, put it back in the fridge for later. Do this for three-four days. If after four days she isn't eating, try another meat, she may just not like chicken. But you can't play the game where if she isn't eating, you feed kibble. Kibble is addictive to dogs - it is full of "yummy" carbs and is sprayed with fat or something to make it smell good. To dogs, kibble is sometimes more appetizing than raw.

Also, don't keep switching from raw to kibble back and back to raw. Find what you can stick with. You're really going to upset their tummies one day. By the way, it's okay to feed mostly chicken while money is tight. Feed whatever you can get for the least amount of money. Or feed kibble, but don't keep switching.