No. Grapes, for unknown reasons yet, cause acute renal failure in some cats, not only in dogs. The toxicity reason remains unnamed, but, it is suspected to be contained by the fruit’s flesh, not the seeds. Any products made from grapes like raisins, sultanas, and currants have the same effect. Clinical signs include oliguria (not so much urine), or anuria (the failure of the kidneys to produce urine), lethargy, nausea, vomiting, diarrhea, anorexia, and dehydration.