@PossumRoach I have some photos from another angle that I won't post as they were poorer quality than this one, and it was indeed rather bloated/fat around the neck, chest and belly. Whether this is obesity or another health issue (like abcesses or cancer, both of which are known to sometimes occur in rodents)) I do not know, but the animal definitely looked to not be in the best of health, although it was still moving around relatively normally. I assume the keepers are aware and the animal is being followed up on and treated, but an explanation in the exhibit would have been welcome.