In most cases, trees need to be protected from deer all year round. This is especially true if you want to protect small trees from deer or if you just planted some fresh, new trees. Once a tree is a few years old, you likely do not have to worry about protecting it from deer as it will be stronger and can handle a little damage.

The average lifespan of a wood fence is 15 to 20 years, but some can last for 40 years or more depending on several factors. The type of wood is crucial; for example, untreated pine may only last 5 to 10 years, while pressure-treated pine can last up to 20 years, and cedar's natural resistance can extend its life to 40 years. Other factors include local weather conditions, with wet and windy climates causing faster deterioration, and the quality of maintenance. Higher-end wood, metal posts, and privacy fence styles also tend to last longer.

Posts for a horizontal fence should be no more than 6 feet apart. Wood pickets are not as strong when mounted horizontally as when mounted vertically. As such, the fence panels on a horizontal fence can’t cover the same span between posts as a vertical fence can. If you install the posts further apart on a horizontal fence, the fence will lose stability, making the boards more likely to sag. 

A split rail fence is not typically considered among types of dog fencing. Many dogs are small enough to slip out between or under rails, and dangerous pests like coyotes can slip in. However, adding wire mesh to a split rail fence can add the security needed for dog safety without compromising the timeless look that makes the split rail style appealing.