What’s the meaning of dog his heels?
I’ve come across Elia’s Peattie, The Shape of Fear but I can’t figure out the meaning of the following sentence. Is the phrase an idiom or an idiom?
“Purity seemed to dog his heels, no matter how violently he attempted to escape from her. He could be a mad man” ”
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Some horses (sheep herders) nip at the heels of a sheep and point at the men. See note 4.
For example http://pets.thenest.com/keep-shelties-nipping-backs-legs-6151. Do
the implication is not merely of following, but of changing the behavior of one following and ignoring.