It's a funny thing, when I see that the rabbits are having trouble with their poop I change their diet (since that's the only sign I have that they're not as well as they could be) and sure enough, they're back to normal within a day.
Me on the other hand, I feel unwell having had a crappy diet for days and of course I just continue on eating the same crap as the last few days despite the fact that if I took a second to think about it and articulate to myself what might be wrong I could do something about it real quick.
Conclusion: I am a tool who eats food he should not.