Bully stick calories and nutrition: What's really in one?

A standard 6-inch bully stick averages about 88 calories, based on university research that measured 9 to 22 calories per inch. That is a small share of a large dog's daily needs but can be 30% or more for a small dog. Bully sticks are also high in protein and low in fat, so calories are the main thing to watch, not the ingredient itself.

Bully sticks look simple: one ingredient, nothing else. But simple does not mean low calorie, and that surprises a lot of owners. A widely cited study found that most people underestimate exactly how many calories a single stick actually contains.

Below we break down what the research says, the calories by stick size, the protein and fat profile, how bully stick calories compare to other treats, and how to factor them into your dog's daily diet without overdoing it.

How many calories are in a bully stick?

The most reliable figures come from a study published in the Canadian Veterinary Journal by researchers at Tufts University's Cummings School of Veterinary Medicine and the University of Guelph. They tested 26 bully sticks purchased from retailers in the United States and Canada and found a mean caloric density of 15 calories per inch, with a range of 9 to 22 calories per inch. Based on an average stick length of about 5.7 inches, that worked out to roughly 88 calories per stick, with individual sticks ranging from 45 to 133 calories.

For context, the researchers noted that 88 calories is about 9% of a 50-pound dog's daily calorie needs, but around 30% for a 10-pound dog. That gap is the main reason size-appropriate portioning matters so much with this treat.

How do calories change by size?

Length is only part of the story. Diameter matters too, since a thicker stick packs more mass into the same length. Rough ranges reported across research and manufacturer data:

Two 6-inch sticks can differ by 40 to 50 calories purely based on thickness, so if you are watching calories closely, thin or standard sticks are the more predictable choice over thick, braided, or jumbo ones. For guidance on matching size to your dog, see our complete guide to bully sticks for dogs.

What is the nutritional profile of a bully stick?

Because a bully stick is a single ingredient, its nutrition is straightforward:

• Protein: commonly 80 to 90% on a dry-weight basis, making it one of the most protein-dense chews available.
• Fat: generally low, though it varies slightly by processing method.
• Moisture: low, since drying is what concentrates the calories and nutrients per gram in the first place.

That high protein content is exactly why bully sticks are calorie-dense despite having no added sugar or fillers. For the full picture of what goes into one, see what bully sticks are made of.

Are bully sticks more calorie-dense than other treats?

Often, yes, on a per-gram basis. A biscuit or soft training treat is usually bulked up with grains or fillers that dilute its calorie density, while a bully stick is concentrated dried muscle. That is not a strike against bully sticks; it simply means a little goes further, both in satisfaction and in calories, so portioning matters more than it would with a lower-calorie treat.

They are still generally a better choice than rawhide from a safety standpoint, since they are fully digestible rather than a blockage risk. We compare the two in more detail in bully sticks vs. rawhide and other chews.

How do I fit bully stick calories into my dog's diet?

The general rule for any treat, bully sticks included, is to keep it under about 10% of your dog's total daily calorie intake. Beyond that, it's worth adjusting a few habits:

• Match size to your dog. A small dog does better with a thin stick or a portion of one, not a full 6-inch standard stick.
• Reduce regular food slightly. On days your dog gets a bully stick, trim their kibble portion to account for the extra calories.
• Limit frequency. Most dogs do well with one bully stick per day at most, and often less. See our guide on how many bully sticks a dog can have for the full feeding frequency breakdown.

Can bully sticks cause weight gain?

Yes, if they are given too often or in a size that outpaces your dog's calorie needs, particularly for small breeds where one stick can represent a large share of a day's calories. The fix is not to avoid bully sticks, but to size and space them appropriately and factor them into your dog's overall diet. Watch for gradual weight gain or reduced interest in regular meals as signs that treat portions need adjusting, and check in with your veterinarian if you are unsure.

Beyond calories, the same research also tested bully sticks for bacterial contamination and found some samples carried bacteria such as E. coli, so basic hygiene when handling them matters too. We cover that alongside other safety considerations in are bully sticks safe for dogs?