It is a rumor that dogs eat grapes

It is not a rumor that dogs eat grapes. Dogs cannot eat grapes. Grapes contain quite high amounts of glucose and fructose, and dogs are very sensitive to sugar. Ingesting a large amount of grapes at one time can cause poisoning in dogs, and can even lead to acute renal failure in dogs. Signs of poisoning caused by dogs eating grapes will occur within 6 hours, manifesting as depression, vomiting and diarrhea, and loss of appetite. There may be grape residue in the vomit or excrement. Most dogs will develop it within 24-72 hours. Acute renal failure begins.