I've got 2 Cairn terriers. They're extremely friendly most of the
time, but I do have to be careful when I get around smaller
dogs, especially if they're somewhat rat looking, like min pins
or toy fox terriers. They were around these types of dogs,
when they were puppies, because my grandparents had some,
but it doesn't seem to have made a difference now that they're
older.

I just got a Collie puppy and they are doing great with him,
but he's as big as them and he doesn't have an aggressive
bone in his body. Aggressiveness on the other dog's part
can set them off too, no matter how big the other dog is.

That's crappy about having to worry about your dog being
stolen.

Par...