If the animals causing the problem require those areas to live, then a habitat modification solves the farmers problem without having to kill them. In my bussiness, I alwayse need to tell someone to trim trees, move wood piles, fix fences, net Koi Ponds, etc. That is a small form of habitat modification. Make the critters not want to be there, take away cover, access, water, food, and they will go next door instead.