Breed Weight and Death-Coded Report Share in Dogs
Across 91 well-reported dog breeds, heavier breeds carry a higher share of death-coded FDA CVM reports, large breeds (≥25 kg) average 4.5% versus 4.1% for small breeds (<10 kg).
Research question
Among dog breeds with more than 1,000 FDA CVM adverse-event reports, does average breed weight relate to the share of reports that record a death outcome?
Methodology
We took every dog breed in the FDA CVM extract with a recorded average body weight and more than 1,000 reports (91 breeds), and compared each breed's death-coded report share against its average weight. "Death-coded share" is the breed's death-outcome reports divided by its total reports, the same figure shown on each breed page. Nothing is modelled; the weight and outcome values are read directly from the dataset.
The pattern: bigger breeds, higher death-coded share
Splitting the 91 well-reported dog breeds by size shows a clear gap. The 34 large breeds (average weight 25 kg or more) carry a death-coded report share of 4.5%, while the 24 small breeds (under 10 kg) sit at 4.1% - roughly 1.1× lower. Mid-size breeds fall in between. In plain terms: when a heavy breed shows up in the FDA database, a larger fraction of those reports involve a death than for a small breed.
That does not mean weight causes the deaths. Large breeds live shorter lives and face different conditions - gastric torsion, certain cancers, joint disease, and they receive different drugs, any of which could explain the gap. The reporting itself is also uneven: a death is far more likely to be reported than a mild reaction. The chart below shows where the most-reported dog breeds land individually.
Death-coded report share by breed (most-reported dogs)
FDA CVM Animal Adverse Event database, dog breeds with 1,000+ reports
What this analysis cannot tell us
This is an association in voluntary reporting data, not a causal finding. Larger breeds tend to have shorter lifespans and a different mix of conditions and medications, any of which could drive the pattern instead of weight itself. Death outcomes are also more likely to be reported than mild ones, and the recorded "average weight" is a rough per-breed figure. Read this as a pattern worth noting, not a risk score for any individual dog.
Source
- FDA Center for Veterinary Medicine, Animal & Veterinary Adverse Events (openFDA) - open.fda.gov