When dogs have stomach disease, they must avoid certain foods and it is important to properly regulate their gastrointestinal issues at this time to prevent the aggravation of the dog’s stomach problems!

　　1. Dogs should not eat liver for long periods. Liver is rich in vitamin A; occasional intake is beneficial and harmless to dogs, but using liver as a daily main food can cause excessive vitamin A intake or even toxicity.

　　2. Dogs should not eat foods like scallions and onions. Some dogs may experience hemolysis of red blood cells and hematuria after eating these foods. Although the exact mechanism is unclear, it is confirmed to be related to certain substances in onion-like foods.

　　3. Dogs should not eat seafood and other allergenic foods. Dogs can develop allergies to many foods with symptoms varying individually and severity differing. Possible symptoms include redness and swelling around the mouth, restlessness, generalized itching, allergic papules on the skin, and allergic diarrhea.

　　4. Dogs should not eat foods high in sugar, fat, or salt. High sugar and fat foods easily cause obesity, which can lead to a series of diseases such as fatty liver, diabetes, hypertension, and coronary heart disease, impairing the locomotor, circulatory, and reproductive systems. These diseases threaten the dog’s life especially as they age.

　　5. Dogs cannot eat raw eggs. Raw eggs contain a protein called avidin, which depletes the dog’s biotin (vitamin H), causing biotin deficiency. Dogs may experience hair loss, weakness, slow growth, and skeletal deformities. However, cooked eggs are excellent treats and can be given in moderation.

　　6. Dogs should not drink milk. Dogs lack the enzyme lactase to digest lactose, so drinking milk can cause diarrhea.

　　7. Dogs must not eat chocolate. Chocolate contains theobromine, which is the main toxic component for dogs. Dogs accidentally ingesting chocolate may show vomiting, frequent urination, restlessness, overactivity, increased heart and respiratory rates; severe cases can cause arrhythmia, convulsions, and even death due to cardiovascular failure.

　　Chocolate poisoning is directly related to the type of chocolate and the dog’s size. The purer the chocolate and the lighter the dog, the greater the poisoning risk. The most dangerous is the highest purity dark chocolate, which contains about 400 mg of theobromine per ounce (28.3 g). In other words, a dog weighing 1 kg could die from eating just 9 grams of pure chocolate.

　　Basically, the chocolate you casually leave at home affects your dog the same way cockroach poison in the corner affects passing cockroaches.

　　Dogs must not drink cola. Cola and many sodas contain caffeine, which is harmless to humans but toxic to dogs due to differing metabolism. Approximately 100–120 mg of caffeine can poison a dog. Dogs drinking too many caffeinated beverages can experience heavy panting, extreme excitement, rapid heartbeat, tremors, convulsions, high fever, and in severe cases, central nervous system damage and heart failure leading to death.

　　Dogs should not eat ice cream. Sweet ice cream is not suitable for a dog’s digestive system; the sugar and milk are hard for them to digest, especially dogs with weaker or older stomachs. After eating ice cream, they may have severe diarrhea, vomiting, and skin allergy symptoms.

　　Dogs must not eat bones. Bones are considered a dog’s favorite but are actually very dangerous.

　　Dogs should not eat bones, especially sharp bones from poultry such as chicken or duck. Swallowing these with sharp edges or points can damage the stomach mucosa, leading to acute gastric ulcers. Dogs will show symptoms like vomiting, loss of appetite, and abdominal pain. If treatment is delayed, this can develop into chronic ulcers with occasional vomiting, usually in the early morning or fasting times, fluctuating appetite, and worsening condition. This chronic gastric disease is very difficult to completely cure (Source: PetsZone)