Fallow may well be predominant grazers, but at this time of year between harvest and new crops there is very little to graze. Also, when there are prolonged periods of frost or snow they will devastate a woodland. They love to snap Ash stems off at about chest height which is less than ideal with the current Ash situation. Fallow are no friend to either the farmer or forester! Shooting females is the key to population control. Try and get as many as you can as early as you can before they group up into larger groups later in the winter. Constant pressure will quickly turn them nocturnal though. Hit them hard and then let them settle for a while and repeat. Also, try to be as random as they are as they will quickly learn your methods and avoid you! Get some very good optics and an illuminated reticule as most of your success will be at very low light. Good luck!
MS