Pigs have a natural tendency to chew. They are also attracted to blood. Once biting has started, it tends to be infectious. Tail biting can be seen in a number of different scenarios, ranging from an occasional occurrence to an explosive outbreak. Damage to tails by pen mates contributes to major losses in the pig industry.Halt is a deterrent paste that, when used properly, helps manage the problem of tail biting and sucking behavior in swine. This "ready-to-use" paste is made of natural ingredients and is applied to the tail and surrounding area to be saved.