A neighbor installed an ultrasonic animal deterrent that agitates my dog. How do I raise an effect they cannot hear?

A small green device appeared at the edge of the yard next door, pointed toward our shared boundary.

The neighbor installed it to keep rabbits away from new plants. It emits a high-frequency sound when its sensor detects movement. I cannot hear anything, but my dog now hesitates near that side of our yard, whines and pulls toward the door when the device activates.

I cannot prove the frequency is causing every reaction. The timing is consistent: the indicator flashes, the dog startles and the behavior stops after we move away. Before the installation, she used that part of the yard normally.

The neighbor says the product is marketed as harmless and inaudible to people. I am not claiming it is medically dangerous. “Harmless” also does not answer whether it creates recurring distress for an animal next door.

I would like him to switch it off for one week while we observe the dog, then reposition or replace it if the reaction stops. That is a small test rather than a demand based on competing internet claims.

He worries rabbits will destroy the plants during the pause. Temporary mesh or another non-emitting barrier might protect them, but choosing an alternative is his decision. I can offer to help install a short-term barrier without accepting permanent responsibility for his garden.

My partner wants to buy a frequency meter. I think the simple on-off comparison comes first. Measuring a sound would still leave us arguing about what the number means.

Would you ask for a test pause, request that the device face away from the boundary or involve management immediately? How should neighbors evaluate a device when one household cannot perceive the effect that is obvious to the other household's animal?