Dog Feeding Amount Calculation | Essential for Hong Kong Dog Owners: Daily Calorie Formula + Weight Reference Table

Quick answer: Dog daily calories = 70 × body weight (kg)^0.75 × activity factor. Table 15-4 in the book 'Nutrient Requirements of Dogs and Cats' uses metabolic weight expression: active pet dogs about 130 kcal/kg^0.75, inactive about 95, senior or overweight about 105, young adult dogs about 140, hunting dogs about 180. Example: a 10kg average family dog needs about 530-730 kcal/day, which converts to about 150-210g of dry food at 3.5 kcal/g. The above are reference values; actual amounts should be based on your veterinarian's advice and packaging recommendations.

Step 1: Weigh your dog (don't guess)

The book points out that animals' energy requirements are most closely related to metabolic weight (body weight^0.75), not directly proportional to body weight. The reason is simple: fat tissue has lower metabolic activity than lean tissue, so for dogs of the same weight, a fat dog's actual requirement will be lower than a lean dog's.

The book gives a very concrete example: a beagle at normal weight (about 25% fat) has an energy requirement of about 130 kcal/kg^0.75; when the same dog is fed to 38% fat, the requirement drops to about 107 kcal/kg^0.75. But converted to 'per kg lean tissue', it's 157 kcal, essentially unchanged.

So: besides weighing, you must also do body condition scoring. Ribs palpable, waist visible = average; ribs not palpable, belly sagging = overweight, use a lower factor.

Step 2: Calculate RER

RER (kcal/day) = 70 × body weight (kg)^0.75

Step 3: Multiply by activity factor (two common standards from the book)

(A) Book Table 15-4: Adult dog daily metabolizable energy maintenance requirements

(B) FEDIAF 2016 activity level factors cited in the book (also based on kg^0.75)

Calculated reference table (average family dog, between 95-130):

Key reminder: The gram amount depends entirely on your food's calorie density. Dry food is generally 2,800-4,050 kcal/kg, i.e. 2.8-4.05 kcal/g; for the same 10kg dog, food at 2.8 kcal/g requires 221g, while food at 4.05 kcal/g requires only 153g. Check the kcal ME/kg on the packaging and do the math yourself.

Step 4: Practical Hong Kong living

1. Timed and measured feeding: fixed time, fixed portion daily, use the same bowl and scale
2. One or two meals a day is fine: the book states adult dogs can achieve optimal health with one meal per day; two meals make it easier to monitor appetite
3. Don't leave food out: book data shows free feeding causes 30-40% of dogs and cats to overeat
4. Count treats in the total: treats should be within 10% of daily calories, don't treat them as 'not counted'
5. Weigh every two weeks: if weight goes up, reduce by 5-10%; if down, increase; don't make drastic changes at once
6. Senior dogs don't necessarily need less food: the book indicates that to maintain net protein balance, senior dogs may need up to 50% more crude protein; weight loss in senior dogs is usually muscle loss, so don't blindly reduce food

Hong Kong examples: four common situations

Case A: 8kg poodle, two walks a day Average activity factor 110 → 110 × 8^0.75 = 110 × 4.76 ≈ 524 kcal/day, i.e. about 150g of 3.5 kcal/g dry food. Important reminder: Table 15-4 and FEDIAF factors are absolute values of 'kcal × kg^0.75', not multipliers on top of RER. Just use 110 × 8^0.75 directly, no need to multiply by RER again.

Case B: 25kg Labrador, low activity 95 × 25^0.75 = 95 × 11.18 ≈ 1,062 kcal/day → about 303g of 3.5 kcal/g dry food, split into morning and evening meals.

Case C: 4kg toy dog, senior Use 105 for senior: 105 × 4^0.75 = 105 × 2.83 ≈ 297 kcal/day. Senior dogs should not have their food blindly reduced; instead ensure sufficient protein (the book indicates senior dogs may need up to 50% more to maintain net protein balance).

Case D: 30kg working dog (search dog, cart dog) 175 × 30^0.75 = 175 × 12.82 ≈ 2,244 kcal/day, which is 1.5-2 times that of an average family dog; sled dogs can be more than 5 times. Feeding for these dogs should be adjusted weekly according to training volume.

Practical portion adjustment table

Measuring tool recommendations

• Electronic scale (1g precision): much more accurate than a measuring cup, especially for small dogs
• Same bowl, same location: reduce behavioral variables
• Record sheet: date, weight, daily grams, feces, energy level, all on one page
• Weigh treats: one small treat can already be 10-20 kcal

Relationship between water intake and feeding amount

The book's water chapter provides several practical numbers to help you judge whether feeding arrangements are reasonable:

• Dogs' maintenance water requirement is about 50-60 mL/kg body weight/day (simple estimate); the book also mentions measured average of about 72.9 mL/kg for indoor large dogs, and another estimate of about 37.5 mL/kg, with differences due to activity level and food intake
• For a 10kg dog, that's about 500-600 mL of water per day
• Another estimation method: daily water intake ≈ 2-3 times dry matter, or 1 mL/kcal metabolizable energy
• Dry food has only 8-10% moisture, canned food over 75%—so dogs eating canned food will drink noticeably less water, which is normal

Practical observation: If your dog eats dry food but drinks very little (chronically below 40-50 mL/kg), or suddenly drinks a lot more, both directions are worth discussing with your veterinarian.

How to measure dry food most accurately

Starting point for puppy portions

There is no single formula for puppies (weight changes weekly, expected adult weight undetermined). Practical approach:

1. Use the age table on puppy-specific food packaging as the first reference
2. Use RER × 2.0-2.5 as a cross-check
3. Weigh every two weeks and compare with growth curves (see breed page weight charts)
4. Observe body condition: puppies should have palpable ribs but bones should not be visibly protruding

Common mistakes

Coordination with cluster

• Calorie formula and cat version calculation → Cat Calorie Calculation
• Want to know how to choose between canned and dry food → Wet vs Dry Food
• Food transition method → Cat Food Transition Guide
• How to read labels, calculate carbs → Dog Food Label Interpretation
• Difference between complete and complementary → Complete vs Complementary
• Old portion guide → Dog Feeding Portion

References

• National Research Council (NRC) 'Nutrient Requirements of Dogs and Cats' (2006): Energy, Protein chapters
• FEDIAF 2016 adult dog activity level and energy requirement standards (cited in the book)
• Agriculture, Fisheries and Conservation Department (AFCD) pet care information: AFCD
• Veterinary Surgeons Board of Hong Kong: VSBHK

Related products (available in Hong Kong, checked 2026-10-12)

• Piper Black Diamond Dog Canned Food Series Adult Formula Beef Liver + Potato 400g — reference price HK$18/can
• Farmina N&D Quinoa Functional Natural Dog Food Weight Control Formula Small Kibble Lamb 2.5kg — reference price HK$392
• Japanese Moisture-proof Sealed Twist-top Food Container with Measuring Cup for Cat/Dog Food — reference price HK$45

The above content is for reference only and cannot replace veterinary diagnosis and treatment. Feeding amount is a highly individual matter; please consult your veterinarian and use the recommendations on the food packaging as the final basis.

📌 Key Summary

• Daily calories = 70 × body weight (kg)^0.75 × activity factor
• Book Table 15-4: inactive 95 / senior overweight 105 / average 130 / young adult 140 kcal/kg^0.75
• FEDIAF activity factors 70-175, working dogs and sled dogs calculated separately
• Gram amounts must be converted according to the food's kcal/kg, cannot apply other brands
• Free feeding causes 30-40% of dogs and cats to overeat; senior dogs may need 50% more protein