Nibbling p. pr. & vb. n. : of Nibble

Example:
How do you get a horse to stop Nibbling?

Taxonomy
nibble, Merriam-Webster Online Dictionary, nib, Dictionary, webster, Word Games, bite, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, Search, ble, Inflected, bling, Etymology.

Defination from the web:
nibble from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 2 : to take away bit by bit <waves nibbling the shore>intransitive verb 1 : to take gentle, small, or cautious bites; also : snack ...