I usually enjoy a lengthy snooze after Chris gets up, but he came back in after feeding the herd and said, "Something's wrong with Trent." Apparently he didn't get up to go get breakfast (highly unusual, as persistently hungry as he is), so Chris picked him up and set him by his food, where he immediately fell over. (To give credit where credit is due, sweet little Owl stayed by him the whole time.)
Trent's walking with almost no control over his back legs. While he doesn't seem to be in pain, he is noticeably weaker. He's been whisked off to the vet with an unusually low amount of resistance and protestation on his part, and Chris has instructions to call me when he knows more.
UPDATE: Trent appears to be dehydrated. The vet's working to pump him full of fluids, and they'll keep him there for the rest of the day to observe him. It looks, however, that things are going to be just fine. I can't wait for him to come home so we can love him to death.