Remy “the unicorn” Weaver, 2, hand feeds a goodie-appropriate carrot stick to a goat during 'Boo at the Zoo' held Sunday, Oct. 28 and produced by Reston-based Roer’s Zoofari. Nathan Bean, 10, Rowen Weaver, 2, and Jacob Leichtweis, 10, join in on the fun. Local businesses sponsored trick-or-treating booths, passing out candy to the children.