Roxy feels sick

We woke up this morning at 5:15 and Roxy was in the bathroom having bloody diarrhea. I'm not sure what happened to cause her to have this problem. Luckily chihuahua poop is very little so its not as big a deal to clean it up. Most of it was on the throw rugs that I could put in the washer. She didn't seem sick except for the bloody diarrhea. She has been running around and wanted to eat. I gave her some canned food of the I/D formula. She hasn't had anymore diarrhea this morning so maybe she is better now. I hope so.