I occasionally catch our cats chasing after frogs, which emit a high pitched squealing noise that has to be heard to be believed. Either because this is so off-putting, or because our cats are dimwitted and poor hunters generally, they don't seem to know what to do with a frog. We've had no fatalities so far.

As for other cats, they do frequently have banshee-style stand-offs with them, but so far all parties have emerged unscathed. Our little three-legged cat Pixie is the fiercest, but generally seems to believe she's scared off cats single-handedly when in fact it was me or Janet appearing in the doorway that caused her opponent to turn and run. This may have given her a false belief in her own indomitability. I do worry one day she'll charge off aftter a retreating cat and have one of those "Han Solo" moments when it stops and turns round.