How many extra calories does a dog need when hiking?

On day hikes, dogs burn 25-50% more calories than their resting needs. On multi-day backpacking trips — especially off-leash — calorie needs can nearly double.

How many calories per cup of dog food?

Most commercial dog foods contain 300-500 calories per cup. Check your specific brand's label — this variation makes a big difference in portion sizing.

Should I feed my dog more on hiking days?

Yes. Increase portions based on distance and intensity. For short day hikes, add 25-50% more food. For strenuous multi-day trips, you may need to double their intake.

Hiking Dog Calorie Needs (with Dog Food Calculator)

How to calculate your dog's calorie needs for hiking and backpacking. Includes a simple formula and practical feeding guidelines for the trail.

Proper nutrition is one of the most important — and most overlooked — parts of hiking with your dog. Before you worry about which brand to pack, you need to know how much your dog actually needs to eat on trail.

The Calorie Formula

The starting point is your dog’s Resting Energy Requirement (RER):

RER = 70 × (body weight in kg)^0.75

This gives you the baseline calories your dog needs just to exist — breathing, digesting, maintaining body temperature. It doesn’t include any activity.

To get daily calorie needs, multiply RER by a life-stage factor:

Life Stage	Multiplier
Inactive / weight loss	1.0
Neutered adult	1.6
Intact adult	1.8
Active / working dog	2.0–3.5
Puppy (4–12 months)	2.0
Young puppy (under 4 months)	3.0

For a hiking dog, use the active/working multiplier range. A moderate day hike puts you at 2.0–2.5x. A strenuous multi-day backpacking trip with an off-leash dog pushes toward 3.0–3.5x.

This calculator will only tell you your dog’s rough calorie needs. Emphasis on rough. Every dog is different, and trail conditions, weather, and your dog’s fitness level all affect the real number. When in doubt, consult your vet.

How to Apply This on Trail

Day Hikes (3–8 miles)

Dogs typically burn 25–50% more calories than their normal daily expenditure. For most dogs, this means adding an extra half-cup to a full cup of food on hiking days. Feed the extra portion after the hike, not before.

Multi-Day Backpacking

This is where it gets serious. On our 900-mile AT thru-hike, Toby’s calorie needs increased from an average of 1,100 calories up to 2,100 calories per day. That’s nearly double.

For multi-day trips, split meals into breakfast and dinner. Pre-measure portions into bags before your trip so you’re not guessing on trail.

Off-Leash vs On-Leash

Off-leash dogs cover significantly more ground than you do — running ahead, doubling back, investigating every smell. Their actual mileage can be 2–3x yours. Factor this into your calorie estimates.

Dog Food Calorie Density

Most commercial dog foods contain 300–500 calories per cup. That’s a huge range. Before your trip, check the caloric content on your food’s packaging and do the math.

For a dog needing 2,000 calories per day:

300 cal/cup food: ~6.7 cups per day
500 cal/cup food: 4 cups per day

This directly affects how much food weight you’re carrying. Higher calorie density means less weight in the pack.

Why Dehydrated Food Works for Backpacking

Dehydrated dog food saves 30–40% weight compared to traditional kibble while delivering the same nutrition. You add water at camp — water you don’t have to carry from the trailhead.

The tradeoff is cost. Dehydrated food runs significantly more than kibble. But for multi-day trips where every ounce matters, the weight savings justify it.

Signs Your Dog Isn’t Getting Enough

Watch for these on multi-day trips:

Visible rib prominence increasing day over day
Decreased energy or enthusiasm on trail
Eating unusual things (dirt, sticks, grass)
Slower pace than normal

If you notice these, increase portions immediately. It’s far easier to add calories on trail than to recover a dog who’s been underfed for days.

References

This formula is adapted from methods published by OSU’s Veterinary Medical Center and the Pet Nutrition Alliance. Both are solid resources for diving deeper into canine nutrition science.