Interesting are fox shot year around as pest or is there a session? I ask because it mostly winter time here for the furs and I was always told a red fox will not go to ground unless a dog is almost on it in the winterMostly used to flush and retrieve, with some pointing. When we do a drive hunt, line hunt or a Kettle hunt it is usually multiple game in the same seasons. No telling what is going to flush, mostly Hare, Pheasant, Grouse, Fox and occasionally Deer and Hogs. Ducks and Geese by the Creeks. We don't shoot Deer during a drive or kettle hunt (illegal here).
Usually mixed agriculture and forest. No telling what is going to flush out of a Corn or grain field. We pay special attention to hedgerows.
Hard for a hound to catch a Fox until the Fox runs out wind, a dog can outlast a Fox. Dogs have deeper chests more lung capacity, Fox have narrow chests to fit in the burrows better, a skinned Fox reminds me of a narrow chested Whippet, the fur makes them look bigger than they are. But mostly a Fox will run from cover to cover or often to a den. We often have a few earth dogs with us to send down a burrow or into a stack of hay rolls. Where we hunt, a Fox is seldom farther than a quarter of a mile from a burrow, often multiple burrows within a hundred yards.
Very few Jackel, Wolf or Lynx around, a lot Fox. Fox are pretty much the apex predator here, cars. disease and hunters are the only real threat to them. Occasionally a Hawk or Eagle will pick off a pup. Side note, one way I find a Fox burrow is to watch the trees and see which ones the Hawks are sitting in late spring. the Fox pups come out to play about dark or a little earlier, the Hawks know this. If there is no nest around the Hawks are sitting up in that tree for a reason.