Is Your Dog Overweight? Body Condition Score (BCS)
The Body Condition Score (BCS) is a 9-point scale used by Australian vets to assess body composition. A BCS of 4–5 is ideal. Here is how to assess your dog at home:
| BCS | Description | What you feel / see |
|---|---|---|
| 1–3 | Underweight | Ribs, spine, hip bones visibly prominent |
| 4–5 | Ideal | Ribs felt easily without pressure, waist visible from above |
| 6 | Overweight | Ribs felt with firm pressure only, waist barely visible |
| 7 | Obese | Ribs difficult to feel, no waist, abdominal fat deposits |
| 8–9 | Severely obese | Ribs not felt, massive fat deposits, waddles when walking |
If your dog is BCS 6+, consult your Australian vet before starting a weight loss program. BCS 8–9 requires veterinary-supervised weight loss with regular monitoring.
How to Calculate Your Dog's Weight Loss Calories
Use your dog's target weight (ideal weight, not current weight) to set the calorie target, then feed at 70–80% of RER for weight loss:
RER = 70 × (target weight kg)0.75
Feed 70–80% of this value for weight loss
Example: Overweight Labrador
- Current weight: 38 kg | Target weight: 30 kg
- RER = 70 × 300.75 = 70 × 12.82 = 897 kcal/day
- Weight loss feeding: 70% of 897 = 628 kcal/day
- If food = 3,400 kcal/kg → 628 ÷ 3,400 × 1,000 = 185g per day
- Expected loss: 8 kg over ~6 months at 1–2%/month
Never reduce below 60% RER — this risks nutrient deficiency and muscle loss. Weigh monthly and adjust downward as target weight approaches. Use Pet Food Optimizer's free tool to get a pre-calculated daily portion for your dog's breed and target weight.
Top Weight Management Dog Foods in Australia 2026
Royal Canin Satiety Support
Veterinary-grade satiety diet with dual-fibre complex (cellulose + psyllium) for extended satiety. High protein preserves lean muscle mass. Clinically trialled for weight loss — dogs lost an average 11% body weight in 12 weeks.
Hills Science Diet Perfect Weight
Clinical nutrition formula available from PetBarn and Woolworths. No artificial colours or flavours. Hills backs this with a money-back guarantee if the dog doesn't achieve healthy weight in 3 months.
Advance Weight Control
Australian-formulated, widely available at PetBarn, Petstock, and IGA. Good value option with L-carnitine to support fat metabolism. Lower protein than premium options — supplement with lean protein if using long-term.
Frequently Asked Questions
What is the best dog food for overweight dogs in Australia?
Calorie-restricted formulas with high protein and high fibre: Royal Canin Satiety Support (vet grade), Hills Science Diet Perfect Weight, Advance Weight Control. Target caloric density below 3,200 kcal/kg and feed to 70–80% of RER based on target weight.
How do I calculate how much to feed my overweight dog?
RER = 70 × (target weight in kg)^0.75. Feed 70–80% of this value for safe weight loss. Example for a 38 kg Labrador targeting 30 kg: RER ≈ 897 kcal/day; feed 628–718 kcal/day. Adjust monthly as weight decreases.
What breeds are most likely to become overweight in Australia?
Labrador Retriever (genetic POMC mutation), Cavalier King Charles Spaniel, Cocker Spaniel, Pug, English Bulldog, Beagle, Dachshund, and Golden Retriever. Desexed dogs of any breed have 20–30% higher caloric reduction needs.
What health risks does obesity cause in dogs?
Type 2 diabetes (4× higher risk), osteoarthritis progression, heart disease, hypertension, respiratory problems, reduced lifespan (2+ years shorter), and increased surgical/anaesthetic risk. 40–45% of Australian dogs presenting to vets are overweight.
Obesity-Prone Breeds — Specific Guides
Calculate Your Dog's Weight Loss Calories
Enter your dog's breed, current weight, and target weight — we calculate the exact daily portion for safe, vet-grade weight loss.
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