Also referred to as a windpipe, the trachea is a long tube that plays an important part in a dog's respiratory system. Because dog collars tend to apply pressure during dog walks, they do increase the risk of tracheal damage. However, this is more common with choke and prong collars - harmful products designed to inflinct pain and discomfort. If your dog tends to pull during walks, you might want to consider a dog harness instead.