Dogs have earned their reputation as loyal companions, but not every breed is an easy match for first time owners. A dog’s environment, routine, and training matter just as much as genetics, and the way people handle a pet can quietly shape how that pet reacts under stress. In a recent video, American dog behavior expert Casey Ray broke down five breeds he says are most frequently connected with biting incidents, while stressing that blame rarely belongs to the animals themselves.
Ray explained that his goal was not to shame any breed, but to help owners understand how structure, upbringing, and day to day management influence behavior. He also made a point of reminding viewers that these lists often reflect human choices, from poor breeding practices to inconsistent boundaries at home. The common thread is that many bites happen when a dog is overwhelmed, undertrained, in pain, or repeatedly put in situations it cannot handle well.
German Shepherds landed on his list partly because of how popular they’ve become. Ray described them as powerful, intelligent, confident dogs, but also noted that rapid popularity can attract careless breeding over time. When that happens, overall health and temperament can suffer, creating dogs that are harder to predict and more challenging for casual owners. With a breed built for work and protection, proper guidance is not optional.
Jack Russell Terriers may be small, but Ray pointed to their intense energy and strong prey drive. He suggested that frustration can turn into quick nipping, especially when these dogs do not get enough outlets for movement and mental stimulation. Their bold, stubborn streak can be charming, but it also demands consistent rules and follow through. Without that structure, the behavior many people brush off as feisty can escalate.
The biggest surprise for many viewers was the Cocker Spaniel. Ray said their issue is often pain related rather than attitude, specifically chronic ear infections that may go unnoticed. If a dog’s ears hurt and a child pulls or grabs near that area, a bite can be a reflex. He added that weak breeding lines can also worsen the problem, making careful care and responsible sourcing even more important.
Border Collies appeared on the list because they are wired to work. Ray noted that when a dog bred for herding has no way to burn off energy, frustration can build fast in a typical home setting. Their instincts can also make them prone to controlling behavior, which can turn into trouble if not directed properly.
At the top, Ray placed the Chihuahua, arguing that overprotection often creates the problem. He said these tiny dogs are frequently carried instead of trained, given few boundaries, and become reactive out of fear and stress. In his view, unwanted snapping can even be rewarded accidentally, reinforcing the habit. He believes that treating them like real dogs, with training and clear limits, can transform them into fantastic companions.
Which breed on this list surprised you most, and how do you think owners can reduce bite risks in everyday life? Share your thoughts in the comments.
