Ellen Kinney opens the barn door for Dahlia and Duncan. Two black-and-silver pygmy goats, each about a year old, prance out. Kinney has trained them to respond to a clicker, so that Dahlia seems to dance while Duncan jumps up and down from a plastic chair. Those aren’t their best tricks. Dahlia and Duncan work as therapy animals at the Barking C.A.A.T. (Center for Animal-Assisted Therapy) Ranch in Lakewood, Colo. Among the ranch’s clients is a teenage girl with severe social anxiety who works with the goats, getting to know and be comfortable with them, going for walks in the park with ... Read More