Sick day

Today Yuki appeared unwell. He didn’t get up with us and stayed on the bed for most of the morning. He didn’t purr when I petted him and he barely moved. He didn’t have a fever and his breathing was normal. I picked him up and brought him into the living room where he laid still just watching us for a few more hours.
In the afternoon he got up and sat for awhile then wanted to go out. We watched him for awhile then brought him in. He drank water for the first time around 7pm and ate a little supper. By bedtime he seemed to be back to himself.
No idea what that was, but it was a tense day for us.