The Petty Dwarves: History (p2)

The Sindar, not yet acquainted with Dwarves, thought the Petty-dwarves were animals, and hunted them. Not until the Dwarves of the Blue Mountains established contact with the Sindar did the latter realize what the Petty-dwarves were. Afterwards they were mostly left alone, but not before the Petty-dwarves came to hate all Elves with a passion.