Treeing dogs were developed, chosen for a keen sense of smell, the ability to track, chase and corner any manner of animal independent of human commands, and, most importantly, to follow an animal both on the ground and when it takes to the trees. A good coonhound will bark and keep its prey treed until the hunters arrive. Bloodhounds specifically were added to many coonhound lines to enhance the ability to track. Coonhounds can hunt individually or as a pack. Generally, hunters do not chase their quarry along with the hounds, unlike organized foxhunting, but wait and listen to the distinctive baying to determine if prey has been treed.