Cats supposedly hear up to 65 kHz, mine didn’t react to my 40 kHz unit, but I still keep it low and watch her behavior.
I’ve got a rabbit, seemed stressed near the repeller at first, so I shifted it to another room. Better safe than sorry!
My guinea pig didn’t flinch with the ultrasonic on, vet said smaller pets might hear it but usually aren’t harmed.
Tested it with my dog, ears perked up at 35 kHz, but no distress. Still, I turn it off when he’s napping nearby!
My Border Collie became extremely anxious after installing an ultrasonic pest repeller, hiding under the bed all day. He returned to normal the next day after removing the device! Dog owners should use with caution.
Cats have a wider hearing range than dogs! My two cats reacted completely differently - the Ragdoll showed no response, while the Siamese refused to enter the room with the device.
For reptiles, my experience is: Ultrasound has little effect on snakes, but lizards may show signs of distress. Keep devices at least 3 meters away from terrariums and monitor their activity levels and feeding habits closely.
@CatWhisperer is right! My guinea pigs stopped eating entirely during ultrasonic device operation. The vet recommended switching to physical pest control methods, and they’ve since regained their liveliness.
Ultrasound may cause feather plucking! My cockatiel started excessive preening after one week of device use, which stopped after discontinuing it.
If you must use ultrasonic repellers, choose adjustable frequency models. Start at the lowest setting and gradually increase while monitoring pet reactions. Discontinue immediately if any abnormal behavior occurs.
While fish can’t hear ultrasound, vibrations from some devices may affect them. My discus fish became less active after installing a repeller.