I'm a woman, and a rambler - can't say I've heard of one of us killing a cow (except by proxy in the supermarket). Quite like cows as it happens, though usually preoccupied looking at wild flowers etc. ;o)
Wild flowers killing cows, now that would be something :-)
That can happen, many wild flowers are poisonous - I read somewhere that buttercups are poisonous to cattle. Ragwort is very poisonous to horses.
Mind you, a sheep once ate my wife's Milky Way on the top of Honister Pass.