askHELTIE HELTIEdog® Is sugar in food a problem for dogs too?

Is sugar in food a problem for dogs too?

We all know that people should not eat and drink too much sugar. It is unhealthy and fattening. Especially when it comes to so-called fast sugars, which are common in sweets and biscuits. But does the same apply to dogs? Are they also allowed only a limited amount of sugar? And is there actually sugar in dog food?

Feeding

18 February '25 • 2 min reading time

To start with the last point, Yes, dog food contains carbohydrates and sugars. These often come from grains, which are a key ingredient in many types of dog food. Starch is typically the main energy source in dog food. Cheaper dog foods often contain more starch, usually derived from grains, compared to premium dog food.

Types of Sugars

Not all sugars and carbohydrates are the same. Cooked starch is easily digestible for dogs, while lactose can be problematic for some. Cellulose from plants is partially digestible for most dogs, thanks to the beneficial bacteria in their gut. While it is well-known that different grains are digested differently in humans—for example, rye is processed differently than wheat—this has not been sufficiently studied in dogs. Therefore, it is still unclear which type of grain is the best energy source for dogs. However, it is clear that grains are often used as a cheap filler in dog food. More grains in food mean fewer healthy fibers, vegetables, proteins, and healthy fats. Additionally, grains are not a natural part of a wild dog’s diet.

A Sweet Tooth and Sugar Crashes

Just like humans, dogs love sugar. This has even been scientifically proven by giving dogs the choice between water, sugar water, and regular dog food—the sugar water was their favorite. However, sugar in food can be problematic for dogs. Too much sugar in a dog’s diet can lead to obesity, tooth decay, diabetes, and even liver damage. Excess sugar can cause fat accumulation in the liver, which can eventually impair liver function. Dogs with a weakened or damaged liver may show symptoms such as jaundice, fatigue, and digestive issues. Additionally, too much sugar can lead to hyperactive behavior. Fluctuations in blood sugar levels can cause sudden energy spikes followed by crashes—not fun for the dog or the owner.

Not Too Much!

Excess sugar in food not only increases your dog's risk of health problems but also leads to addiction and a preference for sweet flavors. If you want to reduce your dog’s sugar intake, artificial sweeteners are not a good alternative. In particular, xylitol—a commonly used sugar substitute—is extremely dangerous for dogs and can even be life-threatening. Instead, choose a more natural diet with a lower percentage of grains, more fiber, vegetables, meat, and healthy fats. This provides more essential nutrients and keeps your dog healthier in the long run.

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