Recent posts about dogs emitting RF reminded me of something that happened to me almost 40 years ago. I was a newly hired telephone installer. It was my first real job, and I thought I was a lot smarter than I really was.
I was given a trouble report, which stated that the woman's dog barked excitedly whenever the phone rang. I immediately concluded that since dogs can hear much higher frequencies than people, the dog was just reacting to ultrasonic frequencies that came from the ringing bell.
I arrived at the house, and immediately changed the phone, thinking that her old phone had some odd problem with the small brass bells inside. I dialed the "ring back" number, and as soon as the phone rang, the dog barked, and ran back and forth yelping outside the window.
After almost an hour of investigating, I found the problem. The installer who originally installed the phone had ran the ground wire outside and grounded it to a metal clothes line pole. The pole was set in concrete (not a good conductor) and since the dog was attached with a metal chain to the metal clothes lines, so it could move back and forth across the yard without escaping, the ringing voltage (about 90 ac, as I recall) went from the phone, to the pole, to the clothes line wires, and down the chain to the hapless dog.
As I think back on it, the poor dog was (a la Pavlov) probably conditioned to fear telephone ringing...