 In Iowa, snares have to have a 'deer stop' which stops a snare from closing all the way.In the United Kingdom, snares must be 'free-running' so that they can relax once an animal stops pulling, thereby allowing the trapper to decide whether to kill the animal or release it.Following a consultation on options to ban or regulate the use of snares, the Scottish Executive announced a series of measures on the use of snares, such as the compulsory fitting of safety stops, ID tags and marking areas where snaring takes place with signs.