Dog reaction to Ultrasonic pest repeller?

Bought a pack of 4 bell howell ultrasonic pest repellant plug in devices. Says for bugs and mice. No affect on dogs, cats. since plugged in, my houstrained and very behaved mini dachshund has decided to potty in the house! Whats up? Is it because of these things or because hav a mouse n house? Help please!
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