Becky- This is almost what my boy did die of- Colitis, but not the kind with diarrea. It does take about 3-6 weeks for them to get thru it if they have the slightest case. My Levi- had the full blown killer Colitis. But hopefully not you- the horses are back and forth to the vets , hooked up on IV's, mega tons of antibiotics, the neck veins usually blow, so you will need to look for that with the infection to set in too. but yes, tons of biosponge, probios, ulcerguard. you name it, they pump them full of it.. It is not fun, I have a friend in texas her 35 inch show gelding is just getting over it and it has been 5 weeks now.