Shoot on site: (no particular order)
1. Feral cats that don't look too healthy.
2. Any dog running big game.
3. Escaped goats. (Call them feral if you want. They shouldn't be where I shoot/hunt. Fish and Game agrees.)
4. Sheep herders' dogs, left on the lease after the deadline to have everything out. (They will end up doing #2, and I don't care how much people think the owner might return. They never do. They come back with new dogs every year.) Officially, the Fish and Game should get a call about these dogs, so the warden can put them down. Unofficially, it saves a lot of time and paperwork, if they don't have to come out.
5. Dandelions. I hate dandelions.