My cats like to crawl under the fence to go into the next door yard. They don't take care of it so it is a fun yard. EX: one got two grasshoppers today. Well someone moved in with pit bull and another dog. From what I can see they are always out with them but not sure. Of course he assured me this pit bull was not small animal aggressive. I notice that the cats look under the fence first before going now. Well tonight I heard a bunch of barking and the cat ran by quickly. The neighbor called his dogs in and I called my cat in. Normally they can get in thru a doggie door any time but I have been keeping it closed because they are bringing in animals. So did I close up the hole? Then will the cat try to jump over the fence which would be worse. I hate to keep the cats in all the time. This one lived outside his whole life and he loves to catch things and run around. They stay in at night. Will they know how to adapt?