When it comes to dog-proofing your garden, it’s imperative to know your dog’s characteristics and plan accordingly. Start by checking with local authorities to find out whether they impose height restrictions on boundary walls. A five-foot fence should efficiently contain small and medium breeds but may simply provide an agility challenge for a Border Collie. An eight-foot wooden fence is a safer bet. Also, it’s important to ensure that you don’t have any rocks or other objects like an outdoor dog kennel close to the boundary that your dog can use as ‘a ladder’.