Thank you, everyone. This has been the most stressful vacation I've ever had, and I think Mikey is feeling it. I went off to another family gathering tonight, and Don stayed home with him. The problem is that DK and Mikey are both very territorial about their humans. Don is the property of DK, and I am the property of Mikey. The two of them established that, and they tend to stick by it. Mikey loves Don, but having so much time with me gone, sick or seriously stressed, mixed with last night, really seemed to get to him.
Tonight's gathering was not very pleasant (nothing serious) so I decided to leave early. I'm glad I did. Mikey ate some for Don, but when he realized that Mommy was home, he ate the latest portion, which he had been ignoring. I gave him a good bit of petting, and he came downstairs to hang out on the desk with me. I'm trying to test him as little as possible tonight, since his ears are sore from so much pricking, and he seems to be getting stressed from it. I will get one more test tonight, though, and I'm going to keep a very close eye on him. My vet is open tomorrow and Saturday, so I can take him in if I need to. However, if the problem is stress, that will make it worse, so I'm going to watch him carefully.