Can dogs eat peanuts?
Updated 6 August 2026
Yes, a few plain unsalted peanuts are fine for most dogs. Peanuts are about half fat, so a small number is the limit rather than a handful. Skip salted, dry-roasted and flavoured kinds, shell monkey nuts first, and never mix them up with macadamia nuts, which are toxic to dogs.
The detail
Vets Now lists unsalted peanuts among the nuts that are safe for dogs, with the caveat that they come out of their shells first. That makes peanuts one of the few nut-bowl residents a dog can actually share.
The limit is fat. Peanuts are roughly 50 percent fat by weight, so a handful is a greasy meal for a small dog, and fatty binges are a known trigger for pancreatitis. A few nuts as an occasional reward is the whole allowance.
The other half of this page is telling peanuts apart from their neighbours. Salted and flavoured versions, shells, sweetened peanut butters and above all macadamia nuts each move the answer from fine to problem.
Nut bowl triage
| Plain unsalted peanuts | Fine in small numbersAbout 6 calories and half fat, per nut |
| Salted and dry-roasted peanuts | Skip. Salt, plus coatings that can hide onion or garlic powder |
| Monkey nut shells | Remove. Indigestible, and a blockage risk |
| Peanut butter | Xylitol-free brands only, in a thin smear |
| Macadamia nuts | Toxic. Any amount means a vet call |
How much is sensible
| Dog size | Sensible amount |
|---|---|
| Small (under 10kg)Chihuahua, Jack Russell | One or two plain peanuts, occasionally |
| Medium (10 to 25kg)Cocker spaniel, border collie | Three or four plain peanuts |
| Large (over 25kg)Labrador, German shepherd | Five or six plain peanuts |
| Dogs with a history of pancreatitis | None. The fat content is exactly what their diet avoids |
Plain unsalted peanuts
Plain raw or plain roasted peanuts, with nothing added, are the only version worth sharing. Count them out rather than pouring, because at roughly 6 calories a nut they add up faster than any biscuit.
Use them as an occasional high-value reward and keep the day's other treats in mind. The usual guide is that all extras together stay within about a tenth of daily calories.
Salted and dry-roasted peanuts
The pub bowl is off limits. Salted peanuts carry more sodium than a dog should be adding to its day, and dogs handle salt less well than we do in the first place.
Dry-roasted and flavoured coatings are the bigger catch, because seasoning blends can include onion and garlic powder, both toxic to dogs. There is no way to check a coating from the sofa, so the rule is simple: flavoured means no.
Monkey nuts in shells
Shell them first, every time. Vets Now advises removing peanuts from their shells because the shells are indigestible, and a chewed-up shell can irritate the gut on the way through.
Swallowed larger pieces can go further and cause a blockage, especially in small dogs. Monkey nuts also turn up as bird feed, so watch the dog around the feeder as well as the fruit bowl.
What about peanut butter?
Peanut butter deserves its own page, but the short version: some brands are sweetened with xylitol, and xylitol is severely toxic to dogs even in small amounts. Check the label every time, and reject anything listing xylitol, birch sugar or sweetener E967.
A xylitol-free peanut butter in a thin smear is a popular lick-mat filler. The fat maths from the rest of this page still applies, so a smear is the serving, never a spoonful.
Macadamia nuts are a different story
Never let the mixed-nut bowl blur this line: macadamia nuts are toxic to dogs, and Vets Now calls them the one nut every dog must avoid. Even a few can cause poisoning.
VCA Animal Hospitals reports signs starting within 3 to 6 hours, beginning with vomiting, fever and lethargy and progressing to tremors, stiffness and weakness in the back legs. If your dog eats macadamias, or a nut mix that might contain them, ring your vet straight away.
Signs to watch for
- Vomiting or diarrhoea after a fatty peanut binge
- Abdominal pain, hunching or appetite loss in the following day
- Weakness, tremors or wobbly back legs within hours of a nut mix raid
If your dog overdoes it
A few plain peanuts need no action. If your dog has eaten a large quantity of salted nuts, a nut mix that may have contained macadamias, or anything sweetened with xylitol, ring your vet now with the packet details. Out of hours, call Vets Now or the Animal PoisonLine on 01202 509000.
Common questions
My dog ate a bag of salted peanuts. What now?
Ring your vet with your dog's weight and the bag size. Salt in quantity can cause vomiting, tremors and worse, and the fat load alone can trigger a painful stomach. Fresh water down in the meantime.
How many peanuts can my dog have?
A couple for a small dog, up to five or six plain ones for a large dog, and only occasionally. Peanuts are around half fat, which is why the numbers stay this low.
Is peanut butter safe for dogs?
Only xylitol-free brands, in a thin smear. Xylitol, sometimes listed as birch sugar or E967, is severely toxic to dogs, so check the label every single time.
My dog swallowed a whole monkey nut, shell and all. Should I worry?
Watch closely. The shell is indigestible and can irritate the gut or, in a smaller dog, cause a blockage. Ring your vet if you see vomiting, straining, appetite loss or a hunched posture over the next day or two.
Can dogs be allergic to peanuts?
It is possible, though far rarer than in people. Itchy skin, ear flare-ups or an upset stomach after peanuts are worth a vet conversation, and there is no need for peanuts in the meantime.
My dog ate macadamia nuts by mistake. How urgent is it?
Ring your vet now rather than waiting. VCA Animal Hospitals reports signs starting within 3 to 6 hours, including vomiting, fever, tremors and weakness in the back legs. Take the packet with you if you go in.