Sorry to hear about the dog coming over the fence. How scary. Doxies can be obnoxiously loud, but they are seldom aggressive, except in defending their home. But they usually bark, back up, bite if they have to, and back up more.

On a funny note, I have two cats, one (Isaac) who lives to go out and eat grass. He only goes out with me watching him like a hawk, in our little, bitty, fenced in front yard. So one day we're out there, and I see a German Shephard coming down the sidewalk, on a leash, etc. Isaac sees the dog. He starts backing up. Because he's scared? NO! So he will have a runway! As the dog reaches our part of the sidewalk, Isaac takes off, flying over the fence, right at the dog, who backs up in a panic at this 9# tabby cat gone berserk! I get out the gate, grab the cat, say, "I'm Sorry! I'm Sorry!" to the dog owner, who replies, "OH my GAWD! Control your CAT!" Really, pretty funny. Isaac's never done that again, but I do watch him closely. Now he pretty much ignores dogs, and they really ignore him. It's like the fence is a magic barrier.

Good luck with the dogs, and more to the point, their owners. L.