Okay, so I'm not stupid enough to think I can keep guinea pigs outside full time, I live in Wisconsin, but I was wondering about keeping them outside part time. My idea is to have, in addition to their indoor cage, a well-protected outdoor hutch that they would be allowed in during daylight hours (maybe 3-5 hours a day?) of mild days. I was hoping to have it be sort of a triangle shape with a solid area and a grass run that would be fully fenced. They would be semi-supervised, meaning they wouldn't be watched super closely, but I would be outside or watching them from the window inside and checking on them frequently. And, of course, making sure to introduce outdoor time/grass slowly. What are your thoughts on this? Advice on building/designing? Any advice is welcome.
EDIT: something like this:
EDIT: something like this: