* Toxicity is variable: Grapes and raisins contain a toxin that can be harmful to dogs, but the exact amount needed to cause illness or death varies greatly depending on the dog's size, age, health, and even the type of grape.
* The seeds are not the primary concern: The main toxic component in grapes and raisins is not concentrated in the seeds. The entire fruit, including the flesh, skin, and seeds, can be harmful.
* Even small amounts can be dangerous: Even a small amount of grapes or raisins can make a dog very sick.
If you suspect your dog has ingested grapes or raisins, contact your veterinarian immediately.
It's best to err on the side of caution and keep grapes and raisins out of reach of your dog completely.