The leash or lead is used to connect the dog to the handler, lead the dog, as well as to control the dog in urban areas. Most communities have laws which prohibit dogs from running at large. They may be made of any material such as nylon, metal or leather. A six-foot length is commonly used for walking and in training classes, though leashes come in lengths both shorter and longer. A long line (also called a lunge line) can be 3 metres (ten feet) or more in length, and are often used to train the dog to come when called from a distance.
Martingale collars (also called limited-slip collars) are usually made of flat nylon with a smaller fixed-length section (made of either nylon or a short length of chain) that, when pulled on by the leash, shortens up tightening the collar around the dog's neck, to a limited extent. When properly fitted, martingales are looser than flat-buckle collars when not tightened, and less severely corrective than slip collars when tightened.
Money. Therein lies the rub. One of the drawbacks to training competitively is the cost. Between class fees and trial entries, this can be an expensive sport. That doesn’t have to deter you, though. Many clubs offer significant discounts on training and entries if you work at their trials, which was a huge help for me. I earned quite a few free or nearly free classes by working trials. The fees for junior handlers (-18) are also considerably more affordable.
Prong collars (also called 'pinch collars') are a series of chain links with blunted open ends turned towards the dog's neck. The design of the prong collar is such that it has a limited circumference unlike slip collars which do not have a limit on how far they can constrict on a dog's neck. The limited traction of the martingale chain combined with the angle of the prongs prevents the prongs moving close enough to pinch. The collar is designed to prevent the dog from pulling by applying pressure at each point against the dog's neck.
Dog intelligence is exhibited in many different ways, and a dog that might not be easy to train might nonetheless be quite adept at figuring out how to open kitchen cabinets or to escape from the yard. Novice dog owners need to consider a dog's trainability as well as its energy level, exercise requirements, and other factors before choosing a new pet. Very high intelligence is not necessarily a good thing in a companion dog, as smart dogs can require extensive daily mental stimulation if they are not to become bored and destructive.
No breed is impossible to obedience train, but novice owners might find training some breeds quite difficult. The capacity to learn basic obedience—and even complicated behavior—is inherent in all dogs. Some breeds may require more patience or creativity in training than others. Individual dogs that exhibit fearful or anxious behaviors should also be handled with greater care, and especially not trained using harsh corrective methods, as this training can be psychologically harmful to the dog and result in further behavioral issues.