Yes, please let us know what you find out but try not to worry too much. Izzy B. does the same thing from time to time - the first time was when we changed her over to the liver shunt diet (the vet thought she might have it,but ended up not). The vet was not too concerned, had me give her a little bit of liquid Imodium and boiled chicken, yogurt, rice and she got over it very quickly. She has done this one or two more times for no reason but as soon as I give her the Imodium it stops. She recently had the diarrheal stool with mucus without the blood and I knew it was because she was eating too much "junk" food!!! (Treats).
We know your baby will be fine - keep us posted!!!
Barbara and the girls