Dunn and a 33-year-old companion, Lisa Jefferson, were arrested and charged with assault and risk of injury to a minor.
Witnesses told police that Dunn gave a 40-ounce bottle of beer to the boy and ordered him to chug it down. Both children tested positive for alcohol at a local hospital and the 10-month old tested positive for cocaine.
Dunn and Jefferson are both being held in lieu of $100,000 bonds.