Polydactylism is a congenital physical anomaly that involves the possession of more than the normal number of digits (fingers or toes).
(Seemingly a cat called Daniel, a resident at a Wisconsin animal rescue centre, has two extra toes on each paw as a result of this mutation; he has a total of 26. The Milwaukee Animal Rescue Center has been asking for small donations of $26 (£17), one dollar for each toe. Out of a total $86,000 raised so far, $50,000 has come from small donations. Darn it! I knew my Pal Talk donations strategy was flawed.)