To the person who googled “teaching my dog to leave my russian tortoise alone”:
It will be hard. And dangerous for the tortoise. Dogs often think of turtles and tortoises as really fun chew toys. Your best bet is to keep the tortoise somewhere the dog can’t get to it. I use tall baby gates (with cat doors in them) to block my dogs off from various rooms so the cats have places to get away. I mean, sure, some dogs can be taught to leave small animals alone, and tortoises aren’t going to trigger a lot of prey drive, as slow-moving as they are. But why chance it?
P.S. I’m still in England.