when we first got piggies at our last house, we added the prikka strips along all sides of the 6ft enclosed garden, but within no time at all of putting the guineas in their newly built run one day, we went out to see a cat drop down, inside, grab one of the girls, and then leg it over the fence with the pig screaming. it was horrific, and by the time my husband has scaled the fences and found the pig, the cat had killed her with a bite to the back of her neck and had just left her laying under a bush. we buried her after putting the other 3 piggles in their hutch and immediately went to buy the stuff to enclose the run on top too. it all happened in seconds, and it was just by chance that we opened the back door to see the cat drop down there. before that day, we never saw a cat in or around our garden for the year or more we had lived there. i will never ever let my pigs out unsupervised and uncovered.