Is It Bad If Dogs Eat Bark. This can lead to blockages in their intestines this could be fatal in the worst-case scenario. However keep in mind that dogs can choke on mulch and must still be supervised. Lack of mental stimulation is the cause of a number of undesirable and destructive behaviors. If you notice that your dog views wood chip as a meal rather than a cheap alternative to more expensive ground coverings he could be at risk of injury or illness.
However it is bad for your dog to eat sticks if they are swallowed. Not to mention that a dogs stomach is not designed to break down pure wood like that. Tree bark has no nutritional value for your dog and some trees can be toxic. Some dogs require constant chewing stimulation and will chew anything they can get their paws on without a proper distaction. However keep in mind that dogs can choke on mulch and must still be supervised. Types of Mulch Safe for Pets.
Even the bark from nontoxic trees when ingested in large quantities can cause issues by creating intestinal blockages.
They very well might be eating the bark for their dietary pleasure. Some dogs just have more of an inclination to chew than others. For example oak leaves and acorn caps that fall into a dogs water bowl can taint the water as the gallotannins seep in over time. Even the bark from nontoxic trees when ingested in large quantities can cause issues by creating intestinal blockages. However it is bad for your dog to eat sticks if they are swallowed. Chewing and eating tree bark can be a stimulating diversion.