I said I was sure I was older than you. You said this was nonsense. It may be nonsense that I'm older than you; but it's not nonsense that I'm sure I am.
I am the opposite, apart from the allergic bit. All our neighbours have cats, and we constantly find their droppings on our lawn. Also, they sing at night and keep us awake. I wish there were some way of keeping cats out of our property.
My property is well fenced. I frequently see cats walking along the top of my fence, maybe 3 metres off the ground. I don't know how they get up there.
I think my mother went through a similar experience, but the garden centre sold her catnip instead of catsbane, which had the opposite effect of what she wanted.
Colds are more manageable than aconitum poisoning. Also, (and I know this isn't an excuse for wasting water), our water here is unmetred and paid for at a flat rate.
Thing is, I'd need to put one somewhere in the front lawn, but not close to the path between the front gate and the front door. Otherwise, I might annoy visitors.
One reviewer wrote "This device only turns on roughly half the time a dog enters its scan area. After a few months the unit quit altogether. In its defense it did soak a few teenagers in the back yard at 2am on a cold night. I enjoyed that. "
I am in suburbia, and we don't have any of the animals mentioned here. Only cats, dogs and possums (which BTW are not the same animal that Americans call possums)