Where I use to live the garden backed onto a feild on summer evenings one of my terriers would lay down at the back of the garden waiting for a fox that would come regularly .The Fox would get about 20 ft from the dog before the dog jumped up and gave chase for a few hundred yards before returning to the same laying position within a couple of minutes the fox would be back and the whole ritual would start again over and over they did this for 2 season only around this time of year it was quite bizarre.