Turns out the dog is a "companion animal", not even considered a pet, under laws here. So my no pet rule has little bearing, especially with a commercial property management firm.
They rented it with full knowledge and didn't even inform me that an animal was going into my "pet free" home.. not to mention a handicapped person in a wheelchair renting my 3-level home (on a steep lot), which also had me concerned when I found out about that a few weeks ago..
There's so much wrong with this I won't even get started.
On the other hand, the young woman renting it (with roommates) apparently has a rare degenerative disease, so maybe she needs the peace and tranquility of living in my forest home more than I need to be in control of it. Or retain rights to my own property, lol..
So I'm letting it go for now..