September 16, 2025, 11:51 am | Read time: 3 minutes
Stress is a common but often overlooked trigger for stomach problems in dogs. Dog trainer Katharina Marioth explains how stress-related issues differ from food intolerances, which situations are particularly stressful for dogs, and how owners can provide their four-legged friends with more peace and relief in everyday life.
Mental stress can play a crucial role in recurring gastrointestinal problems in dogs. “Just like in humans, stress—whether mental or due to pain—significantly affects the digestive system,” explains dog trainer Katharina Marioth. Typical symptoms include increased belching, smacking, morning vomiting, or so-called stress diarrhea. In such cases, it is worthwhile to take a closer look at the dog’s daily routine and discuss possible stressors with the owners.
New Additions as One of the Biggest Stress Factors
In contrast, other causes such as parasites or intolerances can be relatively easily distinguished. Parasite infestations can be ruled out through appropriate tests, and developmental diarrhea usually disappears after a few days. A food intolerance, on the other hand, often comes with clearer signs: “If the color and consistency of the stool change permanently, for example, to a yellowish hue, or if symptoms are not linked to a specific event like a change in diet, an intolerance is more likely,” says Marioth.
However, if the problems occur in connection with stressful phases such as moving or renovation work, stress is the more likely cause. Many dogs also show restlessness, sudden dandruff, or compulsive behaviors like frequent scratching.
Besides moving or car rides, there are other triggers that are often underestimated. “One of the biggest stress factors is human offspring—a very significant situation for many dogs,” says Marioth.
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Fixed Daily Structure and Feeding Times Can Help Dogs with Stomach Problems
To reduce stress levels in everyday life, calmness is especially important. “Dogs need a lot of sleep, often more than we allow them,” emphasizes the trainer. Even small changes like retreat times can have a big impact. In cases of greater stress, dogs can also be supported with pheromone collars, herbal preparations like valerian or lavender, and micronutrients. Rosehip powder is also a proven source of vitamin C when stress causes inflammation levels to rise.
A fixed daily structure also plays a crucial role in digestion. Some dogs do well with two meals a day, while others need five smaller portions over a certain period. Rituals can provide security, especially during times of change. “But dogs also need to remain flexible—just like us humans,” Marioth reminds.
When You Should See a Veterinarian
However, the time when a veterinarian should definitely be consulted is clearly defined. If diarrhea or vomiting persists, especially in puppies, immediate help is required. Action must also be taken in cases of severe abdominal pain, suspected swallowed foreign objects, or noticeable changes in stool. “If the stool turns black, it indicates internal bleeding. Then you must not hesitate,” warns Marioth. It’s better to consult a veterinarian once too often than to overlook a serious illness.
About the Expert
Katharina Marioth is the founder of the brand Stadthundetraining and the KEML principle. She is an IHK- and government-certified dog trainer and behavioral assessor for dangerous dogs in the state of Berlin. In her daily business, she works closely with veterinarians, scientists, and other specialists on dog-related topics. With her knowledge and skills, she secured the title of Dog Trainer of the Year 2023 in the Sat.1 show “The Dog Trainer Champion.”