collar/shock collar These collars administer an electric shock to the animal in training, in order to reinforce commands and eliminate any bad habits. It may be combined with an "invisible fence," a signal wire surrounding the dog's permitted area. The dog receives a shock if it strays too near the perimeter. Choke collars Choke collars are also a type of training collars. They are made of different materials with high resistance, such as metal or various composites. This type of collar is suitable for obedience training as it tightens around the neck of the animal if it pulls. It is mainly used on dogs. Insect collar/flea collar Impregnated with chemicals that repel or kill external parasites, they are often a supplementary collar worn in addition to the conventional buckle collar. The effectiveness of flea collars is arguable. Although they are convenient because of their cost and accessibility, the insecticide within the collar is most effective in the neck and face area and does not provide full and complete coverage. Flea collars are considered to be more effective in preventing infestation with external parasites rather than treating an active infestation. Flea collars are best used when a proper disinfestation has been performed, both indoor and outdoor. These collars are primarily worn by cats and dogs. A number of the insecticides used in these flea collars are toxic. Pig hunting dog collar This collar integrates a wide collar and a breastplate for dogs that hunt pigs. They are made from multiple layers of extra tough fabric or leather to protect the vital carotid artery and jugular vein of pig hunting dogs should they be attacked. Some of the pig hunting dog collars come in the form of a full-body protection collar. These collars provide good protection for the dog's chest, neck and rib cage. Elizabethan collar Often made of plastic, this collar is shaped like a cone and used to prevent an animal from self-harm, such as a licking at a wound. Tie-up collar Used for bulls and other cattle, this may be a chain (sometimes covered in plastic hose), or a collar of heavy leather or synthetic material fastened with a heavy duty buckle. Tracking collar Used for tracking animal migration or to locate lost pets. The GPS tracker in the collar works as follows. It connects to satellites and transmits location coordinates to the mobile application, which will be displayed