Ever consider fencing for cats? There is a DIY cat fence system on the market that is designed just for cats called the Kitty Corral Cat Fence. 

This DIY fence for cats is easy to install just like a dog fence. Cat fencing is available in 6' or 7.5' heights and lengths ranging from 100-300' to offer homeowners options. The fence system includes a roll of plastic fencing to deter the cat from climbing and jumping on the fence as well as a roll of welded wire fence with PVC to block chewing and digging attempts. Furthermore, overhang extenders are used to keep cats from sneaking out at the top and preventing wildlife, stray dogs and feral cats from jumping into the property. 

The Kitty Corral Cat Fence system is made just for cats and will last at least 20 years outside in all types of weather elements.