Did you know that the way your dog eats can affect the health of both his spine and mouth? Here’s what you need to know and what you can do about it.

Gingivitis, tartar, loose teeth — and the spine. Most people have no problem grouping the first three together, but where and how does the spine fit into a discussion of the mouth? The truth is, the position in which your dog eats can affect his spine as well as other bones and muscles associated with it — and most domestic dogs don’t eat the way nature intended. This can create not only misalignments, but also an acidic pH in the body, which can in turn contribute to oral issues such as gingivitis, tartar and loose teeth.


It’s important to understand the mechanics of how dogs ingest their food. Getting food into the mouth requires use of the dog’s entire jaw and head. In the wild, a dog has to hunt down his prey; because he uses his whole head to get hold of his food, he loses sight of his prey when he bites down. When he opens his mouth to capture prey, his eyes follow the movement of his mandible (lower jaw), opposite to the movement of his head and maxilla (upper jaw), so he can keep his target in sight.

After the prey has been captured and killed, a dog in the wild will often eat lying down. This way, he can hold his food between his front paws and look up at what is approaching from the front, thereby protecting his food. He can pay more attention to the food because it’s in a safer place where he can more easily defend it.

Domestic dogs eat stationary food out of bowls, with their heads and necks in flexion. They end up looking down at their feet rather than forward. Protecting food becomes more difficult because the dog is unable to see who is approaching from the front. (For this reason, eating in this position may lead to behavior problems.)

While eating, the canine teeth are primarily involved in getting food into the oral cavity, while the incisors are used for gnawing bits from larger objects. Biting down uses more force than opening the mouth, and also involves more than just the mouth, as we will see. The muscles used to open the jaw are smaller than the muscles used to close it. This takes advantage of gravity and responds to the fact that, unlike opening the mouth, closing it has to act against resistance (the food).


When getting hold of their food, predators pull with a downward motion of the head and neck as the jaws close and grasp. The action involves reaching in extension with an open jaw, then closing the jaw and flexing the head and neck. Other grasping muscles in the dog’s body are part of this process — including the toes, claws and leg flexors. In the act of acquiring food, even if the food is scavenged, it must be protected; wild dogs guard their food with a movement of the spine that rounds the body over the top of the prey.

Domestic dogs still mimic this behavior, moreso when they lie down to eat than if they are standing over a bowl. As mentioned earlier, it is more difficult to guard food while standing over a bowl than it is to hold it between the front paws.

Dogs need to crouch over their food and round their bodies when they eat in order to balance the muscular stress of obtaining it. This balances the flexor muscles with the extensor muscles and is a behavior they acquired from their ancestors. When the dog is standing to eat, however, this ancestral behavior is changed. This alone can cause subluxation issues because the dog doesn’t follow the need to balance the flexor muscles with the extensor muscles. When extensors are continually fired, they become fatigued
because they cannot eliminate cellular waste products, and re-set. Because of the chronic fatigue in the extensor muscles, the dog’s body is more acidic in pH, which means he will more likely have dental tartar.


Giving your dog opportunities to eat his food as nature intended can help support both his dental and spinal health.

  • Feeding raw bones helps keep his teeth and gums healthy from a nutritional standpoint, but it also gives the dog the muscle opportunity to lie down and protect his food while eating.
  • Healthy chew toys will also encourage him to lie down while exercising his jaw and mouth.
  • Chiropractic care can also help by correcting any subluxations being caused by the way he’s eating, leading to improved health in both areas. Most of what chiropractic does is to help restore the body to its “wilder” or “freer” state, so that overall mobility is better.

Veterinarian Dr. Amy Hayek graduated from Colorado State University College of Veterinary Medicine and Biomedical Sciences in 1998. She opened her own practice in 2001 in Summerville, South Carolina. She teaches for Animal Chiropractic Education Source, has published in the Journal of the AVMA, and lectures for the AVCA and others.

Dr. Bill Ormston graduated from Iowa State University College of Veterinary Medicine in 1988. After attending Options For Animals in 1998 he received certification from the AVCA and began using chiropractic to treat his animal patients. Jubilee Animal Health is a mobile mixed animal practice in the Dallas Metroplex area where he cares for pets and horses using mostly alternative methods. He is one of the founding instructors of the post graduate course in Animal Chiropractic at Parker Chiropractic College in Dallas. Dr.O has lectured both nationally and internationally on Animal Chiropractic and biomechanics and gait analysis in the quadruped. He has written booklets on chiropractic care in the dog and horse and a book about blending traditional and alternative care in pets.