9cf63ef4_s__onions__etc____PragmaticMom__Reasons_to_avoid
[Items to avoid] Grapes and raisins [Reasons to avoid] 
Contain an unknown toxin, which can damage the kidneys. There have been no problems associated with grape seed extract.
Things Dogs Eat That Will Kill Them: Raisins, onions, etc. : PragmaticMom
Reasons to avoid