Why?
Pistachios aren't toxic in themselves, but they're high in fat and usually sold roasted and salted, which can mean vomiting, diarrhea, intense thirst, and possibly pancreatitis if your cat eats a lot. The hard, pointed shells can get stuck in the throat or gut. Poorly stored pistachios can also grow toxic molds called aflatoxins.
How much?
No pistachios for your cat, shelled or in the shell. Toss shells in a closed trash can, since some cats love to bat them around.
The risks
- Vomiting, diarrhea
- Too much salt: intense thirst, stomach upset
- Shells: choking, intestinal blockage
- Possible pancreatitis after a large amount
- Toxic molds on poorly stored pistachios
Your cat ate some: what now?
One or two pistachios usually aren't serious: watch for vomiting, diarrhea and thirst over 24 to 48 hours. Call your vet if your cat swallowed shells and is vomiting, not eating or not passing stool, or if they ate a good handful.
Better options
At snack time, give your cat a cat treat instead. A small piece of plain cooked chicken or fish is always a safe bet.
Common questions
My cat ate a pistachio shell. What should I do?
Watch them closely for 48 hours: loss of appetite, vomiting, a painful belly or no stool can point to a blockage. If any of those signs appear, call your vet.
Can cats eat pistachio ice cream?
No. Ice cream combines lactose and sugar, and some contain nut pieces or flavorings. A lick won't hurt, but don't offer it.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.