I've had my Russian, Henry, for over 5 years and she is my only pet. We are also considering a dog, but are worried about their interaction. Any tips? So worried a dog might decide she is a chew toy!
You're right to be worried, because that's just exactly what the dog will decide. It will be up to you to keep the tortoise safe from the dog. Many of us have dogs and tortoises. But you have to be vigilant - either build fencing so the dog can't get to the tortoise, or always go outside with the dog when you put the dog out.
The dog and tortoise MUST be kept separate. You don't even want the dog to have access to the tortoises part of the yard. The dog will poop there and you will eventually miss some and the tortoise will eat it. Flea and tick meds, wormers, or other meds in your dog's stool can kill your tortoise almost as fast as the dog can.
There should be NO interaction between the dog and tortoise.