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Ideal-weight target
Body condition is the single largest modifiable predictor of canine lifespan in every cohort study published since 2002. Even before any longevity pill arrives, hitting the right body-condition score adds 1.5 – 2.5 healthy years to the median dog. Here’s the math.
Stand over your dog. Run your hands along the ribs without pressing. Pick the description that best matches what you feel and see right now.
Healthy-weight bands by popular breed
Weight bands below are the inter-quartile range from veterinary teaching-hospital databases. Sex and country lineage shift these meaningfully. Use as a starting point, not a verdict.
| Breed | Healthy band (lb) | Practical midpoint |
|---|---|---|
| labrador retriever | 55 – 75 | 65 |
| golden retriever | 55 – 75 | 65 |
| german shepherd | 50 – 90 | 70 |
| french bulldog | 16 – 28 | 22 |
| poodle (standard) | 40 – 70 | 55 |
| beagle | 18 – 30 | 24 |
| border collie | 30 – 55 | 43 |
| dachshund | 11 – 32 | 22 |
| shih tzu | 9 – 16 | 13 |
| great dane | 110 – 175 | 143 |
Why this matters more than the pill
The Dog Aging Project, Lawler’s 14-year Labrador caloric-restriction study, and the Banfield Pet Hospital decade-long retrospective all converge on the same number: dogs maintained near the lower end of the ideal body-condition range live 1.8 years longer on median, with two extra years of pain-free mobility. No therapy in the longevity pipeline — including the rapamycin-class candidate this site tracks — has yet matched that effect size in published canine data. Hit the weight first; layer the pill on top when it ships.
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