Chocolate, Coffee, and Tea: These contain methylxanthines which can cause vomiting, diarrhea, hyperactivity, abnormal heart rhythm, and even death in dogs.
Onions, Chives, and Garlic: These foods can cause GI irritation, red blood cell damage, and anemia in dogs due to the presence of N-propyl disulfide.
Grapes and Raisins: Ingestion can lead to stomach upset, lethargy, and acute kidney injury in dogs. The toxic component is not fully understood, but tartaric acid may play a role.
Nuts: High in oils and fats, nuts can cause vomiting, diarrhea, and pancreatitis in dogs. Macadamia nuts are especially dangerous, leading to weakness, depression, and tremors
Alcoholic Beverages: Consumption can result in vomiting, diarrhea, decreased coordination, difficulty breathing, coma, and death in dogs. Alcohol should never be given to dogs.
Citrus Fruits: Citric acid in citrus plants can cause irritation and central nervous system depression in dogs if ingested in significant amounts.
Moldy Food: Mold on certain foods can contain tremorgenic mycotoxins, causing stomach upset, severe tremors, and seizures in pets.
Xylitol: An artificial sweetener found in many products like gum, candy, and peanut butter, xylitol can lead to stomach upset, seizures, and liver failure in dogs.
Medications: Over-the-counter and prescription medicines, as well as pet medications, can be dangerous to dogs, leading to various health issues and even death if overdosed.