What are the causes of food poisoning in dogs? Why does food poisoning occur?

Jul 26,2025
4Min

Eating expired and spoiled food

Most dogs have the habit of digging through the trash cans, and we are used to dumping household garbage in them. If we do not clean up the leftovers in the trash cans in time, Food will spoil. If your dog swallows these foods, it may cause food poisoning.
After dogs eat spoiled fish, meat, yogurt and other foods, these spoiled foods contain large amounts of Proteus, Staphylococcus toxins, Salmonella enterotoxin and Clostridium botulinum. poisoning due to toxins. Deteriorated fish is contaminated by Proteus bacteria, which causes protein decomposition and the production of histamine. The incubation period of histamine poisoning does not exceed 2 hours. The dog suddenly vomits, has diarrhea, difficulty breathing, excessive nasal discharge, dilated pupils, and ataxia. The dog may be comatose, hindquarters paralyzed, weak, hematuria, and black feces.

Eating chocolate, onions and other foods

Dogs cannot eat chocolate and onions. I believe this is something that most dog owners know, but many people only know that they cannot eat these two foods, but they don’t know. What is the reason why dogs are sometimes fed biscuits or other foods containing theobromine, which causes food poisoning in dogs?

Purchasing low-quality dog ​​food

With the rise of the pet industry, various pet-related industries have mushroomed. As the staple food of dogs, dog food is a must-have food every day, and many dog ​​food brands have won a good reputation with their continuous efforts over the years. However, some unscrupulous traders have noticed this and started selling dog meat under the banner of these brands. The prices are much lower than those on the market. Some owners also bought these low-quality dog ​​foods because they were greedy for some small gains, causing their dogs to suffer from food poisoning after eating these dog foods.

Symptoms of Clostridium botulinum poisoning

Clostridium botulinum poisoning can cause motor paralysis, coma, and even death in dogs. The symptoms of Clostridium botulinum poisoning in dogs are related to the amount ingested. In the early stage, the neck and shoulder muscles were paralyzed, followed by quadriplegia, slow reaction, dilated pupils, difficulty swallowing, salivation, and drooping ears. Conjunctivitis and ulcerative keratitis are more common in eyes. Finally died due to respiratory paralysis. Clostridium botulinum poisoning has a short course and high mortality.
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