One piece of advice: don't get paranoid while reading the Infirmary section. Yes, bad stuff happens and rabbits are pretty fragile. But a lot of this stuff is pretty rare, it's just that it grabs our attention when one rabbit on a huge international forum has head tilt, peritonitis, etc. Also keep in mind with EC that the majority of rabbits will test positive without ever getting sick from it a day in their lives. So even a positive blood titer does not mean a rabbit is or will be ill from EC.
-Angela the Paranoid-From-Being-Infirmary-Mod