Please do not panic. The second post has a poison control hot line and I would give them a call to see what they think. It was only half of a grape and the article says that large quantities can be toxic.
Several canine caretakers wrote in to say that they would no longer give their pets the occasional grape or raisin as a treat. "There are many people who have decided to do the same thing," responds Richardson, "but no one has reported poisoning from their pets ingesting the occasional single grape or raisin. The cases we have received involved ingestion of 2 ounces to 4.4 ounces."
Please let us know what they say and how your little guy is doing.
__________________ “Never argue with a fool, onlookers may not be able to tell the difference.”  Mark Twain |