One of our cats found an interesting prey hiding in a box bush. She harrassed it long enough to chase it out of the bush and it turned out to be a frog. She caught it instantly, but quickly had to release it. Obviously it released some nasty chemicals, for the cat was foaming at the mouth within a minute. We put the dazed, but unharmed, frog in our brand new pond, where it seems to have made itsself at home.