Can Dogs Eat Green Beans? Yes, and the Tinned Ones Are the Trap

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Quick Facts

This is our own research, not veterinary advice. For nearly every food there are many sources, and they do not always agree with each other. We check each claim against the veterinary and poison control sources, and we say plainly where they disagree. Even so, if you are in any doubt, contact a vet and do your own research before you feed anything to an animal in your care.

Green beans are safe for dogs, raw or cooked, and at about 31 calories per 100 grams they are one of the better low-calorie treats there is. The thing that goes wrong is never the bean. It is the salt in a tin, the onion and garlic in a casserole, or somebody deciding to feed a dog nothing but green beans to make it lose weight. Our own rule covers all of it in one line: if it is not pure, it does not go in the bowl.

We have never fed a dog green beans. Not once, not on any of the 20 sits, not with our own animals. I have no story about a dog and a bean, and I am not going to invent one.

What I do have is a rule that covers green beans and a great deal else. I eat beans myself, in stir fries and with plenty of meals, and I think they are very good. What I will not do is put anything in a dog bowl that has been processed, seasoned or tinned, because I have no idea what went into it.

That principle is worth more than a personal anecdote, and it is the spine of this page. The wider list of what is safe is on our page on what you can feed a pet.

If you are interested in getting into house sitting, our book Travel More for Less puts the whole process in one place: clear, step by step guidance from your first questions to your first confirmed sit, and the reviews that open the door to the next one.

Can Dogs Eat Green Beans? Yes, Raw or Cooked

Green beans are safe for dogs, and they are one of the few treats that are genuinely good for them rather than merely harmless. They bring protein, fibre, iron, folate, calcium, potassium, magnesium and vitamins A, C, K and B6, and they cost about 31 calories per 100g.

Raw and cooked are both fine. Cooking takes some of the folate and vitamin C out, but it makes the bean easier to digest, so there is a trade either way rather than a wrong answer.

The one caveat is fibre, which is both the point and the limit. A few beans are a good thing. A bowlful will give a dog gas, diarrhoea or vomiting, and puppies have more sensitive stomachs than adults do, so they need less rather than more.

If you are feeding them fresh, wash them, pull the strings and stems off, and cut them into short pieces. A green bean is a long thin shape, and length is the part worth paying attention to.

The Tinned Ones Are the Trap

The nutritional difference between fresh and tinned green beans is small. The difference that matters is salt. Tinned beans are packed in a brine that carries a lot of sodium, and a dog eating them regularly is taking on salt it does not need. Over time that is the sort of thing that contributes to obesity, heart problems and high blood pressure.

There is a way round it, which is to buy the no-salt-added tins. Those are a genuine option, and if you are going to use a tin that is the one to use.

My own position is simpler than that: I would not feed a dog anything out of a tin except dog food. Not because every tin is dangerous, but because I cannot tell what is in it without reading a label carefully, and the downside of being wrong is a sick animal in somebody else's house. That is not a rule about beans. It is a rule about tins.

It runs further than that in our kitchen. I do not give dogs or cats cured meats either, because they routinely carry garlic, pepper and a great deal of salt. Unless something is pure, I would rather leave it out of the bowl and find a treat that is definitely safe.

The Green Bean Diet Is Not a Real Diet

You will find people online recommending a green bean diet for dogs: bulk out the food with beans, the dog fills up on almost no calories, the weight comes off. It sounds tidy and it is not a good idea.

A dog fed that way is not getting the nutrients it needs, which trades one problem for a worse one. There is not enough animal protein in a bowl of beans, so the dog loses muscle along with the weight. And because metabolism adjusts as the weight comes off, the dog tends to put it all back on when normal food returns.

The proper way to get weight off a dog is a weight-loss diet and an exercise plan set by a vet, with beans kept as an occasional treat like anything else.

If a dog is off its food rather than overweight, that is a different problem with a different answer, and plain rice is usually where that starts.

I have never put a dog on a diet and never fed one beans to try. On a sit, the job is to look after the animal the way the owner has asked, and I am not going to change its diet during the few weeks it is with me. I might suggest something to an owner, but it is a conversation rather than a decision I make on their behalf. That instinct and the guidance happen to agree here, and it is not always the case.

Frozen Ones, and the Choking Question

Frozen green beans are a popular treat because they are crunchy and cold, and dogs tend to like them. The published warning is specific: a frozen bean is hard, and served whole it can be a choking hazard or cause a blockage. Chop them small and stay in the room while a dog eats one.

My own experience of choking, which is not specific to beans, is that it is more of a scare than a common event. In most cases a dog that has something stuck will heave it back up within a second or two and carry straight on as if nothing happened.

That said, I would not argue with the advice here. Better to cut a bean in half than to find out, and watching an animal while it eats costs you nothing. Where I would push back is on the fear itself. A dog coughing over a mouthful of food is usually fine, and treating every one as an emergency is its own kind of mistake.

Green Bean Casserole, and Why It Is Never a Treat

The American holiday version is the clearest example of a bean done wrong: cream of mushroom soup, fried onions on top, salt, sugar and fat throughout. The beans are the only innocent part of the dish.

Onion and garlic are the serious problem, and they are not a small one. Both damage red blood cells, and both turn up in dishes where nobody would think to look for them. A dog that has eaten a plate of casserole has eaten something genuinely worth ringing a vet about, and it will not be the beans doing the damage.

This is where my own rule earns its keep. I do not need to work out whether a particular sauce, mix or dish is safe, because the answer is the same every time: if it is not pure, it is not for the dog.

How Much Green Beans

Treats should stay under about 10% of a dog's daily calorie intake, which is the standard most vets and the literature give. Green beans make that easy, because a bean is almost nothing.

The published portions are by dog size, with each piece about 2.5cm long.

Those calorie figures are our arithmetic on the published energy value of 31 kcal per 100g and an average bean of about 5g. The portion sizes are the ones the sources publish.

The limit worth remembering is not calories, it is fibre. A dog that has had too many will have gas, and possibly diarrhoea or vomiting. If that persists, it is a vet call rather than something to wait out.

On a Sit: The Purity Test

This is the page where the sit angle is easy, because green beans are rarely the food that causes trouble. What causes trouble is the tin, the dish and the sauce, and all three are things you meet in somebody else's kitchen.

The purity test does most of the work. If a food is a single ingredient and nothing has been done to it, it is almost always fine. If it arrived in a tin, a jar, a packet or a sauce, it has a label and the label is worth reading. Salt, onion, garlic, sugar and xylitol are the five things to look for, and at least one of them turns up in most of what is in a stranger's cupboard.

Where I am careful is with a dog on a prescribed diet. If a vet has the animal on a specific food, I am not the person who starts adding vegetables to it, however harmless they look. I follow the owner's routine, and if I think something needs to change, I ask.

That habit is the same one that covers everything else on a sit, and the pre-sit question list is where it starts.

Where This Research Comes From

The sources behind this page:

Conclusion

Green beans are safe, cheap and genuinely useful as a treat, and the only way to get them wrong is to serve them with something else. Fresh or frozen, raw or cooked, cut small and nothing added.

We have never fed one to a dog ourselves. When we do, it will be a plain bean and nothing else, because that is the rule that has kept us out of trouble so far.

Caro and I have completed 20 house sits across 12 countries, driven 19,000km across Europe in our 1998 VW T4, and saved over $26,500 in accommodation costs over three years of house sitting.

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Frequently Asked Questions

• Can dogs eat green beans?

  Yes, raw or cooked, and plain either way. They are about 31 calories per 100g and bring fibre and a range of vitamins without much of anything else.

• Can dogs eat canned green beans?

  The no-salt-added ones are fine. Ordinary tinned beans are packed in brine with a great deal of sodium, which is not good for a dog over time. I would not feed tinned food to a dog at all, but if you do, use the no-salt version.

• What is the green bean diet for dogs?

  An internet suggestion that filling a dog up with beans will make it lose weight. It is not a valid diet. The dog does not get enough nutrients or animal protein, loses muscle as well as fat, and tends to regain the weight afterwards.

• Can dogs eat frozen green beans?

  Yes, but chop them small and supervise. A whole frozen bean is hard and can be a choking hazard or cause a blockage. Frozen beans are otherwise a good crunchy treat.

• Can dogs eat green bean casserole?

  No. The beans are fine but the dish brings cream, salt, sugar and fat, and it usually contains onion and garlic, both of which are poisonous to dogs.

• How many green beans can a dog have?

  One or two pieces for a small dog up to a large handful for a giant, with each piece about 2.5cm long. The limit is fibre rather than calories, and too many will cause gas or an upset stomach.

• Do green beans help a dog lose weight?

  Not on their own, and not as a replacement for food. They are a low-calorie treat that can sit alongside a weight-loss plan a vet has set, but the plan is what does the work.

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