While doing research for book three, MURDER AT THE FORTUNE TELLER’S TABLE, I discovered a phone dogs can use. I was amazed. It sits on the floor, and there’s a large button for the dog to push. The dog is taught to hit it in certain circumstances and/or on command. It’s programmed with a number to call in an emergency. It’s called a K-9 Rescue Alarm.
http://www.ablephone.com/model3000.php