Update:
Little hasn’t been very good

his poos are really bad and causing him problems. I think it’s putting him off eating. I’m having to get browny-yellow mush out of his bum every couple of hours or so.
Yesterday, he was eating okay but only after I would sort his bum out. I would do that, then quickly put a bit of fresh hay by him which he’d eat some of before going back to sleep. Today he’s just not been fussed. He’s been having critical care, only as much as he will take on his own. He’s eaten some hay but not a great deal. I can’t tell if he’s being selective or not, though. We’re hoping that the critical care will sort his poos out so that they aren’t so bad, as then he should feel like eating. If he doesn’t feel like eating, we know it’s teeth or abscess. In about 2 weeks, Little is starting to be due an appointment anyway as it will have been 6 weeks since our last. So, we’ll push it forward if necessary and get the nearest appointment with Simon if Little isn’t showing improvement by Monday/Tuesday.