Nuisance mountain lion

The disposition of the animal would depend on several factors including the age and health of the mountain lion.  It may be possible to trap and relocate or tree, dart, and relocate it.  If the animal was in poor condition and unlikely to survive, the most humane thing would be to put the animal down (kill it). The best course of action is to remove any reason for the animal to be there and/or haze the animal so that it leaves.  If pets can be restricted to indoors for a time or domestic livestock secured to make it difficult for a mountain lion to get close that may solve things.  The ability to do that, of course, depends on individual circumstances.  You can also contact the Fish and Game regional office for advice on hazing techniques that will discourage the animal from staying around. From a legal standpoint, if an animal is threatening domestic livestock the responsibility for any control action goes to Wildlife Services which operates under the Dept of Agriculture.