Irritating foods such as onions, peppers, peppers, onions and garlic are not suitable for dogs. Because these foods will stimulate the gastrointestinal tract of dogs, not only cause inflammation, but also affect the dog's sense of smell.

Onion contains a toxic component, n-propyl disulfide, which will oxidize hemoglobin into Heinz bodies after dogs eat it. Reticular endothelial system devours a large number of red blood cells containing Heinz corpuscles, causing acute hemolytic anemia and damaging bone marrow.

Generally speaking, dogs weighing 15-25 kg will develop severe anemia within 7-8 days after eating a medium-sized onion. After eating 1-2 days, the sick dog discharged red or dark red hemoglobinuria, and vomited and diarrhea at the same time. Symptoms such as depression, palpitation and splenomegaly. Feeding a small amount of onion for a long time will lead to chronic poisoning in dogs, which is manifested as jaundice and anemia.

Dogs with onion poisoning can recover naturally if they stop feeding onions. For severe hemolysis, glucose and Ringer's solution should be given, and cardiotonic agents such as sodium chloride and diuretic (furosemide) should be injected subcutaneously, and blood transfusion should be carried out if necessary.