Sugar and Sweeteners in Dog Treats

Sugar in dog treats is mostly a transparency problem, not a poison problem. Pet food labels do not have to declare sugar the way human food labels do, and the rules let sweetness get built into a treat without the pack making that obvious. That is the real issue for most buyers.^[1][2][3]

There is one exception, and it is serious. Xylitol, sometimes labelled birch sugar, is genuinely dangerous to dogs. That belongs in its own section which you can find further down this article - not lumped in with the wider sugar conversation.^[8][9][10]

Everything else is about knowing what to look for on a label so you can judge a treat properly.

Why sugar in dog treats is more confusing than it should be

Most people carry a human mental model into the treat aisle. Sugar is bad for teeth. Sugar causes weight gain. Sugar maybe causes diabetes. So sugar in a dog treat feels obviously wrong.

The honest picture is more mixed. Dogs do not get cavities the way humans do. Canine diabetes is not driven by diet in the same simple way many people assume. The clearest issue with sugar in dog treats is that it adds empty calories to a product that is already meant to be a small part of the day, and in a country where a lot of dogs are already carrying more weight than they should, they don’t need those extra empty calories.^[5][6][7]

However, the bigger issue is that the label makes it hard to tell how much sweetness is actually in the pack and where it came from. That is what this page is really about.

The labelling gap

Here is the fact that surprises most pet parents…

With human food, sugar must be declared. You flip the pack and you can see the grams per 100g.^[2]

For UK and EU pet food, sugar does not have to be declared at all. The required analytical panel covers protein, fat, fibre, ash, and moisture. Sugar is not on that list. A manufacturer can voluntarily declare it, but most do not.^[1][4]

That means you cannot look at the back of a dog treat pack and find out how much sugar is in it. You can only infer it from the ingredient list - a list which is ordered by weight.^[1][4]

That is the single most important thing to know on this topic.

The names sugar and sweetness hide behind

Once you know sugar does not have to be declared by quantity, the next question is what to look for in the ingredients. Some of it is obvious. Some is easier to miss.

Obvious sugar terms: sugar, sucrose, glucose, dextrose, fructose, corn syrup, glucose syrup, golden syrup, caramel, honey, maple syrup, cane sugar, beet sugar. If any of these appear in the first handful of ingredients, the recipe is relying on added sugar more than you might expect.

Category terms: "various sugars" is a legal umbrella name. It can cover sucrose, glucose, dextrose, molasses, caramel and others without telling you which.^[3][4]

This works the same way "meat and animal derivatives" works on the protein side of the label.

It is legal. It is also deliberately vague.

You can read more about this pattern of vagueness within the pet food industry on our page on Category Labels vs Named Ingredients, and on Derivatives specifically.

Not every sweetening ingredient appears on a label as plain old “sugar”.

Some ingredients add sweetness quite directly, just under less obvious names. Malt extract is rich in maltose, which is a sugar. Fruit juice concentrate is concentrated fruit sugar. Maltodextrin is technically a starch, but it acts more like a fast sugar than its name suggests.

Then there are humectants. These are ingredients used to keep a treat soft and moist.^[5][11]

Glycerine, also called glycerol or vegetable glycerine, and sorbitol are common examples. They are not technically sugars, but they are sweet-tasting, so they can still make a treat seem sweeter.^[5]

The issue here is mainly transparency, not that these ingredients are automatically harmful. They can sit behind a front-of-pack claim like “no added sugar”.

Naturally sweet whole ingredients are a different category.

Sweet potato, carrot, apple, banana, and carob all contain natural sugars, but they are clearly named and easy to recognise. In a short ingredient list, they are not the same signal as added sugars or vague umbrella terms in a harder-to-judge formula.

Glycerine, an ingredient that needs context

Glycerine is used in many semi-moist and chewy dog treats because it helps keep them soft and stops them from drying out too quickly.^[5]

It is a sugar alcohol, but it is not the same thing as adding sugar to a recipe. Its main role is as a humectant, which means it helps hold moisture and keep a treat from drying out.^[5][11]

It is also mildly sweet-tasting. That matters because a product can contain glycerine and still carry a “no added sugar” claim on the front of the pack. The claim may be accurate, but it does not tell you the full story of how the treat has been made or what ingredients are helping shape its taste and texture.

That does not make glycerine automatically bad. The bigger point is that front-of-pack claims can sound simpler and cleaner than the full ingredient list really is. So if you want to judge a treat properly, it is worth checking the back of the pack rather than relying on the headline alone.

Glycerine is also not the only ingredient like this. Molasses, malt extract, maltodextrin, and fruit juice concentrates can all affect sweetness in different ways. The real lesson is not “panic if you see glycerine.” It is “read the full ingredient list, because sweetness can enter a product by more than one route.”

What is sugar actually responsible for in dogs?

Dental disease: in dogs, this is mainly a plaque problem rather than a cavity problem. Plaque is a bacterial biofilm, and once it builds up around the gumline it can trigger inflammation and periodontal disease. That makes plaque control the real issue, not a simple human-style sugar rots teeth story.^[6]

Empty calories and weight: this is the real one. Sugar is calorie-dense and adds no protein or useful fat. In a treat that is already meant to be a small extra on top of a balanced diet, any unnecessary calorie source is worth questioning. Sugar is not toxic. It is just not earning its place. If treats are meant to stay inside the sensible 10 percent of daily calories, the less of that budget you spend on empty sweetness, the better.^[5]

Diabetes: sugar itself is not thought to be the clear direct cause of diabetes in dogs. But extra sugar still adds calories, and excess calories leading to obesity are a recognised risk factor. So even if the story is not as simple as “sugar causes diabetes,” sugar is still something worth avoiding.^[7]

Hyperactivity: the "sugar makes them hyper" idea is extrapolated from an idea about humans that itself is not well supported. There is no solid canine evidence for it.

Xylitol, the red-light warning

This section is different from the rest of the page. Everything above is a judgement call about quality and transparency. This is a safety issue.

Xylitol is genuinely toxic to dogs. Even small amounts can trigger a rapid drop in blood sugar that is potentially life-threatening. Higher doses can cause acute liver damage.^[8][9][10]

What makes it harder is that xylitol is increasingly marketed to humans under softer-sounding names. Look out for:

xylitol
birch sugar
birch sweetener
wood sugar
E967

These are all the same thing.^[8][9][10]

A dog owner who knows to avoid xylitol may not recognise birch sugar on a health food label.

Xylitol is not expected in legitimate UK dog treats, and we are not aware of any mainstream UK treat brand using it. In practice, the real risk is from human products shared or stolen. The common culprits are:

sugar-free chewing gum
some sugar-free baked goods
some peanut butters
toothpaste
chewable vitamins and sugar-free supplements
some sugar-free sweets and chocolate-style products

Before sharing any human food with a dog, check the ingredient list. Look for xylitol and for birch sugar. If either is there, it is not safe. If a dog has eaten something containing xylitol, contact a vet immediately.^[8][9][10]

How to check a dog treat label in under 30 seconds

Flip the pack and look at the ingredients list - which is always ordered by weight.^[1][4]

Look at the first three or four items. Is the first ingredient a clearly named meat or fish, given as a percentage? Good sign. Is it a vague category term like "meat and animal derivatives" or "cereals"? That is a worse starting point regardless of anything else on the pack.^[3][4]

Scan for recognisable sugar words. Sugar, sucrose, glucose, dextrose, corn syrup, golden syrup, molasses, caramel, honey. The higher up the list they appear, the more the recipe is relying on them.

“Various sugars” tells you almost nothing useful. Instead of naming the actual sugars used, the label hides them behind a catch-all category term. For a buyer trying to judge the product properly, that is a big step backwards.^[3][4]

Scan for less obvious sweetening ingredients. Malt extract, maltodextrin, and fruit juice concentrate may not look like sugar at a glance, but they can still add sweetness.

Then look for humectants such as glycerine, glycerol, vegetable glycerine, and sorbitol. These are mainly used to help keep a treat soft and moist. They matter because they tell you more about how the treat has been made and what is helping create its texture.^[5][11]

Test any front-of-pack claim against the ingredients list. "No added sugar" is a claim about a specific thing. It does not rule out glycerine. It does not rule out malt extract. Let the list behind the claim do the deciding.

That is the whole check. It takes less time than queuing at the till.

Where Bounce & Bella stands on this

We do not stock treats or foods with added sugar. As far as we are concerned, it does not belong in a dog’s diet.

That is not the same as pretending every functional ingredient belongs in the sugar bucket. Some products use ingredients such as glycerine to help keep a treat soft and moist. What matters is that the label is clear, specific, and easy to judge.

That is our standard. No added sugar. No vague umbrella terms where a proper ingredient name should be. No label that needs decoding before you can work out what is in the bag.

Our simpler products make this easiest of all. When the ingredient list is short and clearly named, there is less room for confusion, softer front-of-pack spin, or ingredients that do more than the buyer realises at first glance.

If a product is worth feeding, the label should make that obvious.

If you want the wider picture, see our guide on How to Read a Dog Treat Ingredients Label, and our page on Hidden Nasties in Dog Treats.

References

Regulation (EC) No 767/2009. On the placing on the market and use of feed. Covers pet food labelling and analytical constituent declarations.
Regulation (EU) No 1169/2011. On the provision of food information to consumers. Covers human food nutrition information including sugars.
UK legislation. The Food and Feed (Miscellaneous Amendments) Regulations 2022. Includes category definitions used in feed labelling, including various sugars.
UK Pet Food. Understanding Pet Food Labels. Explains pet food label sections including composition, additives, and analytical constituents.
Frontiers in Animal Science. The science of snacks: a review of dog treats. Reviews commercial dog treat formulation, sugars, glycerol, sorbitol, and calorie context.
VCA Animal Hospitals. Dogs, Nutrition, and Periodontal Disease. Explains canine dental disease and notes that soluble carbohydrates do not significantly contribute to plaque accumulation in dogs.
Blue Cross. Diabetes in Dogs. Explains that type 1 diabetes is the most common form of diabetes in dogs.
Blue Cross. Xylitol Poisoning in Dogs. Explains xylitol toxicity, hypoglycaemia, and liver damage risk in dogs.
Vets Now. Xylitol Poisoning in Dogs. Explains xylitol poisoning risks and the need for urgent veterinary help.
MSD Veterinary Manual. Xylitol Toxicosis in Dogs. Covers hypoglycaemia and liver injury or failure linked to xylitol ingestion in dogs.
Food Standards Agency. Approved Additives and E Numbers. Explains E numbers as codes for approved additives.