For a few weeks, our oldest cat took to himself. He virtually ignored us—after being a loveable cuddle cat for years—preferring the basement instead. He often sat in the basement window, looking at any critter who passed by, or even just lounging between the litter boxes, which was sort of weird, but whatever—it was his thing.
We were really worried about him, wondering if he was dying—he is 12 years old, after all—or if something was wrong with him, or even if he was depressed. We tried enticing him out with catnip, his favorite, carrying him upstairs—anything we could think about—but he just didn’t want to hang out. He still ate and digested fine, so the vet said that it could be a psychological thing.