went to the far local to me last night who lost a lamb to the fox,so with the snow being down we just sat in the jeep and waited to see if he came back.we had a long wait but eventually he came and when i spotted him coming through the field he was running flat out then he just stopped and started to head towards the house,he was trying hard to get through the fence but he stopped and put his head through the square in the fence trying to grab a new born lamb which was when i shot him.he wasnt a very big fox but healthy didnt need lamp or night vision.he was about 250/300 yards away.