Fill that kidie pool with old antifreeze and the cougar problem is solved because drinking antifreeze causes cougar to behave like frogs - they croak!
;-0
However, is not legal to fill a pool with anti-freeze. Leaving the drain basin out, however . . . .
You’re mean.
You do not need a kitty pool of antifreeze to kill an animal.
I had a dog get sick from about 2 licks of 50/50 antifreeze.
Not a pretty way to go.