With my larger dogs I was more worried they'd hassle someone else and their dog. With Jenna, I would die if anything happened to her and, while she thinks she's a big dog, facts are facts. She would not survive any encounter with the dogs that roam here. Not even the smaller ones that live next door, simply because they are so aggressive they chase ME down the street if I walk by their driveway, which I do not. Our length of walk time has been easily cut by two thirds of what it was thanks to other peoples dogs.
Jenna was supposed to have "problems" with other dogs when we adopted her, according to the rescue owner. Actually she is completely sedate around larger breeds, but she does get a bit mouthy with the dogs her size and up to about the height of a Samoyed. When she first came to live with us I had to pick her up while a neighbor walked a dog (loose) past us and Jenna got so frothy that she peed on me.
Jenna was on lead, btw.
She's mellowed so much from when she arrived. But I have not. I wouldn't even allow our other dog to be on the floor with her until this year, and even then I watch Ebon's body language because I know how she rolls when she gets snappy. Personally I'd rather they don't get within 6 feet of one another but I know that's not sensible. They actually do very well together if I don't make a fuss, but I remain ready to rescue Jenna if I even suspect any of our other pets is going to lash out at her, cats and rabbits included.
My fear comes from having been bitten myself at a young age, and also from reading other people's accounts of what can happen to a small dog. I don't doubt Jenna is made of strong stuff, but our connection is such that if anything were to happen to one of us, it would devastate the other. Simple as. So her safety is always utmost in my mind.