Although usually well-socialized with other greyhounds, ex-racers often have limited skills for living outside of the racing kennel. However, most Greyhounds are quick learners. They tend to be out-going, happy and sociable with people and seem to relish human contact, even following owners from room to room at home (known colloquially as being a "Velcro dog"). Some Greyhounds are more timid and can for a time have difficulty coping with new people or situations. A period of rehabilitation and a dedicated owner usually helps nervous "Retired Racers" become more confident. A few people also report that they have known "Greys" who at first fear other dog breeds until sufficiently exposed. As the lure used to train greyhounds for racing resembles a hare, retired racers sometimes also mistake smaller dogs for a lure, causing them to set chase. Similarly, small animals including cats may also be the subject of prey-driven behavior by some greyhounds. Prior to adoption, agencies generally screen greyhounds for their suitability around small animals especially by way of "cat testing" in which a dog is carefully exposed to a cat to see his or her interest level.