RE: fox trapping
Many ways to trap a fox. You have to find the animals first. look for signs of them and then set up your fox sets. Any set will work for fox or any animal for that matter as long as you have the animals in that area. If you don't have the animal in your area you are targeting,your not going to catch it. Learn about foxes and their home ranges and start there.
Look for a natural spring that seeps out of the ground.In the winter when the cricks are frozen,these springs will be warm enough not to freeze. Here is where you look for what kinda animals you have from the tracks in the snow. All animals vist these springs when the cricks are frozen. Why,because all animals need water and predators hang out(well visits)these springs also looking for a meal also. Set your traps up here also and will catch about any animal that lives in that area. Even if you got snow on the ground an animal would prefer liquid over frozen.