sheepdog

noun

1. Any of various breeds of dog used for herding sheep; an individual of such a breed.
2. Any of various breeds of dog used for guarding sheep; an individual of such a breed.
3. (dated, slang)A chaperon; an adult who accompanies other people in a supervisory role.
4. (US, slang)A police officer.

verb

1. To chaperon or shepherd.

   “Given the vivacious young redhead's attractiveness, some might have assumed he had more than simply professional reasons for sheepdogging her career, but they would have been wrong. He'd seen something in her ...”

   “On June 14, with Kennedy personally sheepdogging it, the No Child Left Behind Act passed the Senate ninety-one to eight.”