Physical and chemical barriers and pesticides are used to control or kill garden pests. The following are some physical methods of control: Rabbits hop, but do not jump, so a 3' chicken wire or hardware cloth fence will work to keep them out. However, woodchucks, moles and voles burrow, so one needs to bury fencing at least 1 1/2 feet underground. Another deterrent to above-ground critters is electrified wire running above ground across gate openings. There are chemical repellents used on stakes or fencing to keep deer away. For slugs, use diatomaceous earth around plantings, or trap with beer in pie plates or place a wide wooden plank on the garden surface, and next morning, remove slugs that congregate beneath it.
Try not to locate bird feeders too close to your veggie garden as they attract rodents such as voles, chipmunks and squirrels. Consider a cat as a pet!