In general, can dogs have soy sauce is not safe for dogs. This is mainly due to its high sodium content and the possibility of causing adverse health consequences such as dehydration, diarrhea, or even salt poisoning. Soy sauce is also often made with garlic and onions, which are both toxic to dogs in large quantities. Additionally, some varieties of soy sauce are also known to contain a texturized form of soybean protein that is not healthy for dogs or may trigger an allergic reaction in certain dogs.

Soy sauce is a condiment used in cooking and it is usually made from the fermented paste of soya beans, water, wheat, rice bran, and salt. It can be found in many restaurants and supermarkets. Some soy sauce brands are brewed using a traditional method, while others use more modern techniques such as chemical extraction and industrial evaporation. The end result of both processes is a dark, thick, and darkly colored liquid that can be used to add flavor to a variety of foods.

Typical soy sauce contains more than 902 mg of sodium per tablespoon, which is about 230% of the average daily intake for a human (1, 2). This is a dangerously high amount of sodium for dogs.

Ingestion of this much sodium can lead to vomiting, extreme thirst, dehydration, weakness, and diarrhea. In severe cases, it can also cause kidney failure and heart damage in dogs. If your dog consumes soy sauce, you should seek veterinary attention immediately. The vet will likely induce vomiting and administer fluids to rehydrate your dog. They may also administer activated charcoal to prevent further absorption of the toxins from your dog’s stomach and intestines.