absolutly no question about it GO ELECTRIC, my birds are fenced in with the adition of an electric fence, the only year i lost a lot was when i got complacent and didnt connect the fence, lost loads to a fox.... you dont need a full electric fence if you have wire netting just buy a reel of single strand fence wire and do 2, i do 3 trip wires all around the perimeter 1 about 1 foot off the ground and 9 inches away from the fence then 1 or 2 others to form a barrier that no fox can get within 2 feet from the fence. a fox will always dig under any fence but if it cant get near the fence no problem....harry