Oscar really didn't enjoy his annual physical this year, which was on Friday.
In particular, his annual shots left him sore in both in both hips, every time he stood it was like watching him trying to get up with nearly paralyzed hind quarters. Nor did we see him even try to move much for the first 24 hours. Mostly, he hid under the bed, especially after Penwiper hopped up on the bed where Oscar was resting and tried to play. Penwiper was told in no uncertain terms to go away. (As was I when I later went to examine his feet. That was one generally unhappy cat.)
Oscar's ghost routine included skipping two meals completely, even with room service.
Needless to say, we were relieved when he appeared for Saturday dinner, and by Sunday morning was hopping on the bed for the morning snuggle on my shoulder.
He's okay now, but it was a little scary.