So you have to watch rabbits a little closer for problems. By the time you actually see that they're "a little #sick", they may in fact be quite sick indeed. Add to this that rabbits can be prone to G.I. #stasis (which I understand is also a big deal in #horses, and probably #donkeys?), which can be fatal very quickly, and it means you need to keep on your toes.
If your rabbit isn't well - uncharacteristically refusing food or something - get them to an #exotics#vet#pronto.