Murphy seemed a bit more like himself today - this evening he asked to walk down to the lake (how does he "ask"? By looking longingly in that direction and pulling me that way, of course). He doesn't have a lot of energy, but he's acting more normal. Ate all of his dinner and tried to get into the cat food, hasn't thrown up, so far, so good. I just wish we knew the cause of these bouts of upset.