Wrought iron fences are attractive options, but they have drawbacks. They have enough space between the uprights for small dogs to fit through. They also do not go into the ground except at the posts, leaving wiggle room at the bottom. Chain link fences do not offer space for escape through the links, but unless the fence is securely anchored into the ground around the perimeter, a dog could dig under or pull up the bottom. Underground electronic fences allow unobstructed views, but they transmit a shock to the dog that some owners do not like. Some dogs find the temptation to escape worth the electrical charge. Picket fences are another attractive option but are not right for larger dogs. Wooden fences with no spaces between the slats are safer. However, persistent dogs can dig underneath or chew through the wood.
The first consideration when choosing a fence is your dog's size. A dog that can fit through small spaces will escape from a wrought iron fence. A tall dog will be able to scale a low fence.
If your dog is a digger, you will need a fence that goes into the ground throughout the perimeter and not just at the posts. An alternative is to lay a foundation of concrete or chain link under the fence to prevent your dog from digging. For a dog prone to jumping, a fence at least 6 feet tall is recommended.
If your dog barks at other animals or people, it should be shielded from everything going on beyond the yard. If your dog is aggressive, visual access to the activity outside of the yard can stress it. Wooden fences with no spaces are appropriate for these situations.
Check with your homeowners or neighborhood association to determine if any restrictions on fencing exist. For yards exposed to high foot traffic, a short or open fence allows for children to try to pet your dog and troublemakers to taunt it. Neither of these situations is safe for them or your dog.
Your personal preference for the look of a fence is an important consideration. Cinder block walls are the safest and most private type of enclosure for your dog, but you might not like the appearance of a concrete wall around your home. A picket fence could be your ideal, but a large or active dog might be able to scale it.
Cost is another important factor. Closed wooden fences and wrought iron tend to cost the most, while chain link is more economical. Electric fences range from relatively inexpensive do-it-yourself models to thousands of dollars installed.