Hi IvanB
I wouldn’t be at all surprised if the hogs can interpret the weather better than we can. But the other possibility is that she may have another nest elsewhere. But also they don’t tend to build such elaborate nests for the Summer – it’s mostly for giving birth and hibernation. So it may be that she is planning on using that nest for hibernation.
I had a young hog one year who built a very elaborate nest (suitable for hibernation) but decided not to hibernate and used the nest some days, but not all, for over-day stays. He visited every night, but obviously had another nest elsewhere where he spent the other days.
