I did control work on the same sheep ranches for over 36 years . When I started on one ranch they were docking 70 - 72 percent lamb crop . With in a couple of years of doing hard work , denning , trapping , snaring and calling coyote, fox and bobcats they were docking 84 percent , and in the end they docked 112 percent when I retired after they sold their sheep , and were able to run sheep in pastures that they hadn't been able to in 30 years , due to depredation . I worked on the predators 12 months a year not just during the fur season because that was my job , to kill predators and protect livestock . It takes a different mind set to do predator control work . First you need to not think about fur values , you need to think about livestock values . I did it per predator taken the same price per animal 12 months a year , fur in the prime was a bonus not the goal . The killers were the primary targets . Tracking and knowing where they were living and coming into the livestock , which ones were doing the killing what type of animals were doing the killing and targeting those animals to get the killing stopped was priority one . Next was to target any other predators moving in from the surrounding areas that didn't have a control person working , but most often had fur trappers when the fur prices would allow them to afford to . When I started to learn to do control work ( before uncle Dick outlawed the use of poisons ) there were a couple of old government trappers around that I got to visit with and learn from . They taught me about denning as one of the better control measures , because the biggest reason predators killed was to feed their young . Next came the older predators that were past their prime of life and were taking the easiest food . They taught me about tracking the animals what print belonged to what animal and to tell the subtle differences in each animals prints . That way you can tell that you are in-fact targeting the offending animal . Control work isn't for every one , it is hard work takes determination and the desire to learn about the predators you are targeting . It can be very frustrating trying to get animals that are well trained and intelligent and wanting to raise their young . There are times that you will need to travel long distances on foot , to find the den . People that don't know or understand what it is that you do it for will say that you are a heartless b12342D for taking the pups out of the equation or for taking the predators in general . It's long days in the hot , cold , windy and so many beautiful days outside . It is an addiction and the rewards are many , mostly satisfaction in doing a job well and saving the lives of stock and other wild life . You have so much to learn to be effective at control work . It isn't all about calling or hunting predators , you need to learn how to fine tune and set traps , snares , track and have the patience to let the animals tell you , who you are dealing with and who to target first .