We set-up around a dozen EP10 smart plugs and had a very nice automated set-up. However, our dog started behaving very oddly and went from an "indoor" dog to not wanting to be in the house. We took her to the vets who could find nothing wrong. One evening when it was freezing rain, she was camped in one of our floor beds refusing to come in even though she was shivering. Thinking about anything that had changed in the house, I thought about the plugs. I removed them all to see what would happen. Dog immediately responded and is largely back to normal, though I think we may have inadvertently trained her to be a bit more outdoorsy - which perhaps is no bad thing. 

My conclusion is that the plugs emit a high pitched noise that the dog can hear but we can't. Anyone else run into this?