
Hello, first of all, I'm sorry for the late reply. 
Based on your cat’s picture, it could be infection from gum and lips. Cat's cleft lipitis is caused by various causes. It can occur especially when your cat’s immune system is down. For this lesion, it is recommended to provide probiotics products, antioxidants, and omega-3 products that can boost your cat’s usual immunity.(Flumax, L-lysin etc.._
Also, it is recommended to use Oratene (Zymox) as a mouthpiece product. This product is a treatment for gum disease that treats cat's canker sore, cleft lip, and gingivitis. If your cat's symptoms don't improve afterwards, please consult your veterinarian.

There is a bit of blood on her k9s and she is still behaving normally
Is the cause her teeth, or could it be an infection or sore?

Her mouth has sores on both sides by her K9 teeth