Werewolf syndrome: Disorders caused by chews from China?

Since late summer 2024, a mysterious phenomenon has been causing concern among dogs in Germany: the so-called "werewolf syndrome" is associated with severe neurological symptoms. Although the name is more reminiscent of fantasy stories, there is a serious medical challenge behind the incidents. What is particularly striking is that many of the affected dogs had recently eaten chewing bones made of cowhide, which are said to have come from China. But the causes are still unclear, and researchers are working hard to shed light on the matter.

The Hannover Veterinary School (TiHo) and the Ludwig Maximilian University of Munich have developed a questionnaire to better understand the disease. Owners of both healthy and affected dogs are asked to share their observations. This could help identify risk factors and possible triggers and protect the health of our four-legged friends.

Behind the mysterious term lies a neurological disorder that manifests itself through symptoms such as sudden panic attacks, uncontrolled movements and howling. In rare cases, epileptic seizures also occur. The symptoms often appear suddenly and can greatly unsettle affected owners. What is special is that in many cases these abnormalities appear shortly after eating certain chewing bones .

Although the disease is worrying, there is good news: according to current knowledge, it is not fatal in most cases. The symptoms often subside within a few days or weeks. Nevertheless, quick action is required. An early examination by specialized veterinarians can help to better narrow down the cause and initiate the appropriate treatment.

Researchers currently believe that this is a sign of poisoning, but a direct connection between the symptoms and the chewing bones has not yet been proven. It is therefore important to continue collecting data and to systematically investigate the cases.

In particular, chewing bones made from cowhide and produced in China are suspected of being potential triggers. Official warnings from the Netherlands and Denmark have also brought the problem into the spotlight. There, products such as knotted chewing bones and chewing sticks with cheese were named as possible causes. In Denmark, various chewing products from one supplier were recalled as a precautionary measure after behavioral changes occurred in dogs. These include chewing rolls and chewing products with chicken.

But caution is advised: not every affected animal has eaten these products, and not every animal that is given such chewing bones shows symptoms. The direct connection has therefore not yet been proven. Nevertheless, it is advisable to pay attention to the origin and ingredients when selecting chewing items. If in doubt, it is better to avoid suspicious products for the time being.

Dogs with sudden neurological symptoms show noticeable behavioral changes. These include:

It is particularly alarming if several dogs in the household are affected at the same time. Owners should seek veterinary help immediately if such signs are observed. A neurological examination can further narrow down the cause.

Until scientifically proven results are available, it is advisable to be cautious. If your dog is already affected, you should:

In addition, social media and exchanges with other owners can help share information and raise awareness of the issue.

If a dog suddenly shows noticeable neurological symptoms, action should be taken quickly. A visit to the veterinarian or a veterinarian specializing in neurology is strongly recommended in such cases. These specialists can check whether the symptoms are actually due to a neurological cause or whether there are other underlying diseases.

At the same time, it is important not to jump to conclusions. Even if the symptoms seem frightening, there is no reason to panic. In most cases, symptoms improve within a few days after appropriate treatment. Nevertheless, cases should continue to be monitored and reported to support research.

Taking part in the TiHo Hannover survey is a great way to help shed light on the phenomenon. With the help of committed owners, researchers may soon be able to find a definitive answer - and thus enable future four-legged friends to have a better life.

rabbit meat strips
Dried rabbit meat strips are a natural and particularly well-tolerated chewing alternative. They are ideal for dogs with sensitive digestion or allergies. These strips are low in fat, high in protein and free from artificial additives. Gently dried, they retain their natural taste and contribute to dental care through chewing. Rabbit meat strips offer a healthy and tasty alternative for your dog.

veal shank
Veal chews are a high-quality and natural chewing alternative. They are particularly tough and offer long-lasting chewing fun for dogs of all sizes. Veal chews are high in protein, free from artificial additives and are gently dried to preserve their natural nutrients. Chewing supports dental care, strengthens the chewing muscles and ensures healthy activity.

lamb tripe
Dried lamb tripe is a natural and nutrient-rich chewing alternative. It is gently dried to preserve its intense flavor and valuable ingredients. Tripe is rich in vitamins and minerals, easy to digest and is also suitable for dogs with sensitive stomachs. Chewing supports dental care and offers long-lasting, natural entertainment.

The "werewolf syndrome" remains a mystery for now. What is clear, however, is that quick action and systematic research are crucial. By taking the symptoms seriously, having their dogs examined and participating in studies, owners are making an important contribution to educating people. Until clear results are available, caution is advised when choosing chews. After all, our goal is to enable our dogs to live healthy and happy lives.