Intercanine crown distances of 605 wild South Dakota red foxes and 249 badgers of unknown age were measured; adults and juveniles were diagnosed by radiographs of canine teeth. In foxes, T-tests between similar age, between similar sex, and between combined age groups were significant at .01. In badgers, significance was found only between adult males and juvenile males and between adult males and adult females at .05.
Hart, E. Blake
"Intercanine crown distances in red foxes and badgers,"
Great Basin Naturalist: Vol. 42
, Article 16.
Available at: http://scholarsarchive.byu.edu/gbn/vol42/iss4/16