Among the people foods, grapes and raisins are most toxic to dogs. And of all the dangerous foods for dogs, they are among the worst. It is best to avoid feeding grapes and raisins to dogs.

Although the compound in grapes and raisins that is toxic to dogs is unknown, whatever it is, the results of consumption can be pretty devastating.

Grapes and raisins can cause kidney failure and even death in canines. The symptoms include vomiting, dehydration, diarrhea, lack of appetite as well as a lethargic state. Death may occur within three to four days.