Grapes (and raisins) are considered poisonous to cats and should be completely avoided.

Quick Scoop

  • Veterinarians advise that there is no known safe amount of grapes or raisins for cats.
  • Even a small piece may cause vomiting, diarrhea, lethargy, and in rare but serious cases, kidney failure.
  • Because the exact toxin in grapes is still unknown, the standard recommendation is: never intentionally feed grapes or raisins to a cat.

What To Do If Your Cat Ate Grapes

  • If your cat has eaten any amount of grape or raisin (or you strongly suspect it):
    • Contact an emergency vet or pet poison service immediately ; do not wait for symptoms.
  • Watch for:
    • Vomiting, diarrhea, not eating
    • Weakness, hiding, or acting “off”
    • Increased or decreased urination, or drinking more/less water than usual

Safety Tips at Home

  • Keep grapes, raisins, trail mix, baked goods with raisins, and grape juice well out of reach.
  • Offer only cat-safe treats (commercial cat treats or vet-approved fruits like small pieces of plain melon or banana, if your vet agrees).

Bottom line: If you are ever unsure or your cat may have eaten a grape, treat it as an emergency and call a vet right away.