Troy Mcwilliams, with daughter Mikayala McWilliams, 10, tends to a non-lethal predator deterrent at the Hopland Research &amp; Extension Center in Hopland, CA, which does research on non-lethal predator management on April 21, 2016. Mcwilliams is a 3rd generation worker on the property who has been working there for 15 years and lives on the property with his wife and 3 children. Photo: Brian L. Frank, Special To The Chronicle