Right now Amelia is not at all getting enough time out of her cage. Aside from a little bit of free play time each day she's in a fairly small, boring cage for most of the day. I want to build something outside for her to play in for a few hours each day. Not a hutch, I want to get an expen or something and put a dig box and more interesting toys and things in it. We have about 5 kazillion stupid loose cats in my neighborhood. They come in my yard. They come on my porch. They taunt my dogs, sleep on my outdoor furniture, roll in my plants, stalk my fish, and ruin my life. She wouldn't be out all night or when we're gone in a way I'd have to worry about wild animals or dogs or something, but I don't want a cat to bother her (scratch her or bite her...i don't think they'd eat her and she can certainly stand up for herself, though she's not in the slightest fearful of dogs...) How do I keep cats out of my expen (or playpen, or something similar)? I'm thinking about putting netting over it, but I don't know if that will work/ keep them from jumping on it, flopping in, getting stuck, and freaking out. I'm probably going to put it on the porch or deck so I don't have to worry about her digging underneath, but if it goes on the grass, will bricks around the inside edge keep her in?