Animals were bred for an increased bite threshold, as far as humans and only humans were concerned, which decreased the likelihood of humans becoming victims of dog bites. (thesprucepets.com)
Dogs with a high bite threshold will give many signs before actually biting. (ahna.net)
Dogs that have been punished for using «warning words» or showing the below signs will have a lower bite threshold and go from being stressed to biting much quicker and without giving any warning signs. (ahna.net)