@0xabad1dea I knew a dog who would go bark at cattle. One day he barked at a calf. The calf's mother got irate and charged the dog. I don't recall if he got hit, but he got the fright of his life. From later on he kept a distance when barking at cattle.
(Comment: one must be quite stupid to get a cow angry. These animals can kill a human, let alone a 10 kg dog.)