The overarching answer is no. It is ok for a dog to eat sticks if its just chewing and not being swallowed.
Even the bark from nontoxic trees when ingested in large quantities can cause issues by creating intestinal blockages.
Is it ok for dogs to chew bark. Bark more likely to be an obstruction or to splinter than to be poisonous but as Mirage has told you avoid using cocoa mulch as it contains theobromine the same ingredient that makes chocolate poisonous to dogs. For information on poisons for dogs that is reliable and authoritative look here at the Veterinary Poisons Information Bureau. While the occasional bite of a tree likely wont hurt your dog if hes consistently eating the bark off of your plants he could develop an intestinal blockage or damage his teeth.
Worse yet the bark of some trees such as cherry trees contains poisonous cyanide-like chemicals that can make your pooch very sick if he ingests it warns The Bark website. It has many benefits including dental health provides mental stimulation and cures boredom and for puppies it provides relief when they are teething. It is also a means of providing stress relief.
When a dog chews they release endorphins to their brain giving them a calming and good feeling. I think but may be wrong that some bark chippings are poisonous to dogs as it is treated with something. I only know because I used bark chippings once as a mulch on my border and a group on FB which I came off where up in arms about how I could poison my dogs.
Some kinds of bark are known to be tasty to dogs so dont be surprised if your pup seems to enjoy snacking on your tree. Some dogs just have more of an inclination to chew than others. Some dogs require constant chewing stimulation and will chew anything they can get their paws on without a proper distaction.
It should be no secret that every dog is different. The safest treats and toys are highly dependent on your dogs individual chewing style. For example a Chihuahua is.
Pieces of treated lumber can contain toxic arsenic compounds which are poisonous to dogs and humans. Chewing the wood is certainly dangerous but your dog can become ill by eating food or drinking water from the surface according to Partnership for Animal Welfare. The problem with your dog eating wood is two-fold.
Small pieces of wood can lodge splinters in the mouth and esophagus causing damage. Large pieces of wood can cause even more significant problems including perforated intestines or stomach lining and obstruction of your dogs bowels. How Do I Keep My Dog From Eating Wood.
Even the bark from nontoxic trees when ingested in large quantities can cause issues by creating intestinal blockages. Chewing trees can damage your dogs teeth and small splinters of wood can dislodge and become stuck in your dogs mouth and esophagus. Larger splinters can cause even more health issues in the intestinal tract.
It is ok for a dog to eat sticks if its just chewing and not being swallowed. Many dogs love the feeling of chewing sticks and bark and can even be a stress relief for some. However it is bad for your dog to eat sticks if they are swallowed.
This can lead to blockages in their intestines this could be fatal in the worst-case scenario. The overarching answer is no. Mulch can be made from many different materials from cedar shavings to newspaper to rubber.
One dog may eat it and be fine but another might become seriously ill from the same type of mulch. Its risky to allow a dog to eat mulch of any type but certain mulches are even more problematic and dangerous. Commercially-prepared bone treats are not advisable to be used for dogs according to the FDA.
A lot of issues such as punctures choking and even death have reportedly occurred in dogs who used store-bought bone treats. Non-digestible chews are the most popular alternatives to safe bones for dogs.