The JournalStar.com is running a story about Amanda McFee and her antlered doe. Antlered does are rare but it seems we read about at least one or two being taken each hunting season. The linked article gives some details about why they occur and the frequency in a given population.
As it turns out, antlered does may be unusual, but they're not as unusual as, for example, being struck by lightning. Researcher estimate one out of every 1,000 to 6,000 whitetail does produces antlers, according to the Minnesota Department of Natural Resources. One study in Canada found the ratio to be as low as one out of every 517.