By contrast, the American Border Collie Association registers approximately 20,000 border collies annually. In Australian Shepherds, Rough Collies, and Shetland Sheepdogs, blue means a blue (black-based) merle. Displays are given by working dogs, Australian Kelpies, Border Collies and Australian Cattle Dogs. Rough Collies exhibiting basic herding instincts can be trained to compete in herding trials. Collies can compete in herding events. He sired three litters of registerable Bearded Collies. A Herding Instinct Test introduces Collies and their handlers to herding at the basic level. The ancestors of most Kelpies were British dogs known loosely as collies (sometimes spelled colleys). Mr. Elliot himself is well known for his breed of collies. Several organizations provide herding title programs in which Collies regularly participate. This faulty gene is present in several breeds, but is well known among collies. Bearded Collies have an average weight of . Controversies exist around eliminating this disorder from breeding Collies. The casting of non-Pal bloodline collies in the role of Lassie has met with protest. Some border collies may also have single-color coats.