Pinch collars
Strict
— also known as "parfors" (or, colloquially, "stricter"). Collar made of metal links with sharp protrusions directed inward; the edges of such a collar are usually connected to each other not directly, but with the help of a separate chain, which is attached to the leash. Due to this, when pulling the leash, the protrusions dig into the skin of the dog, causing discomfort.Note that nowadays there are two harmful and even dangerous misconceptions about strict collars. The first is the method of wearing: the parfors is often worn around the neck like a regular collar, while according to the rules such a device should be located just behind the ears and fit snugly against the skin. The second, more critical, is application. The main purpose of the "stricters" is considered to be weaning dogs from excessive aggression or impulsiveness; for this, some non-professional dog breeders use such collars as an everyday accessory. However, this is fundamentally wrong. Firstly, with the constant wearing of a parfort, a dog can simply get used to it and stop responding. Secondly, discomfort when tightening the collar causes nervous excitement and may not suppress, but, on the contrary, increase aggression. If this happens constantly, then the final effect may be the opposite of what is desired: the dog will form a persistent association “aggression / impulse — tightened collar — even more aggression and anger”, and this association will work even with a regular collar.
In light of all this, it makes sense to use strict collars only during training — or for a short time, in special situations: for example, if you need to take a large dog out into the street, which lives mainly in the yard and is not used to strangers. Also note that professional dog handlers use such equipment when training to protect people or property, and for two purposes — to excite them before an attack and to pull them back after the task is completed.