Wisconsin Kitten Erebus Anomaly Sets 29-Toe Cat Record After Surviving Pneumonia

Q: Could the genetic mutation that gave this record-breaking kitten 29 toes offer a hidden evolutionary advantage in the wild?

Possibly, but there is no strong evidence that Erebus’s mutation gives cats a major evolutionary edge overall. Polydactyly in cats is a naturally occurring, inherited mutation that produces extra toes, often on the front paws and especially in Maine Coons. Veterinarians generally regard it as harmless by itself, and many polydactyl cats live normal lives. Because the extra digits can be functional, they may improve grip, stability, or paw surface area in some individuals. That has long fed the idea that polydactyl cats had practical advantages in rough conditions. Sailors historically prized them as ship cats, believing their broader paws helped with balance on moving decks and made them better mousers. In snowy regions such as New England, wider paws may also have acted somewhat like snowshoes, which could help a large cat move over soft ground. But those benefits are likely situational, not transformative. Experts note that polydactyly is not considered a crucial adaptation for feline survival in the wild, and its effects vary widely depending on how the toes are formed. Some extra digits may help, while others simply add maintenance needs, including more claws to trim and a higher risk of overgrown or misaligned nails if not worn down naturally. So Erebus’s 29 toes could offer modest advantages in traction or hunting under certain conditions, but the mutation is better understood as a variable trait than a proven evolutionary upgrade.

3 articles · Updated · The Guardian · Aug 25

29 toes earned Wisconsin Maine Coon kitten Erebus Anomaly the Guinness world record for most toes on a cat, one more than the previous mark of 28.
Polydactyly — a genetic trait relatively common in Maine Coons — drove the record; Erebus was born with eight toes on one paw and seven on each of the other three.
A pneumonia scare nearly derailed that story after an aspiration event sent Erebus to an emergency veterinarian, where he needed oxygen treatment and medication.
Those follow-up X-rays later doubled as key evidence in his Guinness application, and the organization officially recognized the record on May 13.
Erebus, born in March to breeders in Kaukauna, Wisconsin, drew national attention after ABC highlighted both his recovery and his record-setting total.