Once any growling starts the bone is removed and no one gets it. Once they calm down you could give it back and if it starts again remove it. You could also stop giving them completely or make sure they are completely separated enjoying their own space. I might do things slightly different if the dogs were closer to the same size. I wouldn't take a chance with such a small dog.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD