The ultrasonic mouse things do not work and neither do my 2 cats. We poison the hell out of them, trap them but we just want to not have them inside at all. They are limited to under our sink as its near the outside hole and where the traps are set, we can tell the poison is working because their poo is blue but they will never stop coming in.
I spoke to a guy in my office who explained how the steps are installed and they really need to be lifted out so I'm guessing some kind of a forklift or crane.
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