The ball is a stress reliever. Something like a security blanket. Does she squeeze the ball in her mouth? I'm thinking yes?
Have you ever been worked up and squeezed a stress ball in your hand? It relaxes you, it really does. I have two on my desk at work...LOL
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD