Dog Food Portion Calculator

What should I know about The % Body Weight Rule?

Adult dogs typically need 2–3% of their body weight daily in food, measured as raw or wet food weight, or the equivalent in dry kibble (which is much more calorie-dense). Puppies need 4–6% to support growth. Active dogs, working breeds, and lactating females need the higher end; senior dogs, neutered dogs, and those with a tendency to gain weight need the lower end or below. The formula is straightforward: daily food intake = body weight (kg) × 0.02 to 0.03 (for adults). A 25 kg Labrador at 2.5% needs 625 g of food daily. But caloric density varies dramatically between foods — 625 g of high-protein dry kibble has far more calories than 625 g of wet food or raw — so always cross-reference with the manufacturer's guidelines, which are calculated per 100 kcal of that specific food. The % body weight rule is a starting point for estimating quantity; the manufacturer's table is the more accurate guide for their specific product. Adjust based on your dog's body condition (see below) over 2–4 weeks, aiming for a healthy weight trend rather than a fixed formula.

What should I know about Body Condition Score?

The body condition score (BCS) is the most practical tool for judging whether your dog's food quantity is right, because it measures the result of feeding rather than the input. The standard scale runs from 1 (emaciated) to 9 (obese), with 4–5 being ideal. The rib check is the key diagnostic: standing beside your dog, run your fingers along their ribcage. At ideal weight, you should feel each rib easily without pressing hard, but not see ribs from a distance. If you feel a thick layer of fat before reaching ribs, the dog is overweight. If ribs are clearly visible, they're underweight. The waist check: viewed from above, there should be a visible narrowing behind the ribs. From the side, the belly should tuck upward toward the hind legs. No visible waist from above, or a straight or downward-sloping belly from the side, indicates excess weight. Healthy weight matters beyond appearance — overweight dogs have significantly higher rates of joint disease, diabetes, heart disease, and shorter lifespans. Even a 10-15% reduction in food intake can meaningfully extend healthy life in a slightly overweight dog. Adjust portions in small increments (10%) and recheck BCS monthly rather than making large, sudden changes. This calculator gives you a starting quantity estimate; BCS monitoring tells you whether that quantity is right for your individual dog. Always consult your vet for personalised advice, especially if your dog is very under or overweight, pregnant, lactating, or has any health conditions.

What should I know about Always Follow Pack Guidelines?

This calculator gives a starting point — always cross-reference with the manufacturer's guidelines on your specific food, as caloric density varies significantly. Adjust portions every 4–6 weeks based on your dog's body condition.

What do I need to know about Preventive Veterinary Care?

Regular preventive veterinary care reduces long-term costs and improves pet health outcomes. Annual vaccinations (dogs and cats) protect against serious diseases. Regular flea, tick, and worm treatments prevent infestations and parasite-borne diseases. Annual dental checks — dental disease affects over 80% of dogs and cats over 3 years old and causes chronic pain that is often undetected. Microchipping is compulsory for dogs in England and recommended for cats. Pet insurance taken out when pets are young and healthy is significantly cheaper than insuring an older pet or one with a pre-existing condition, since most policies exclude conditions that existed before the policy started. Taking out cover early, even for a healthy young pet, is usually the most cost-effective long-term approach.