the vet checked milu's poop sample and didn't find anything abnormal. so we don't know what happened and why milu had diarrhea. but since there was nothing found in her poop, the vet decided that we are not going to give milu anything (medication)
i am going to continue giving milu pumpkin just to make sure she doesn't have anymore diarrhea. i will try to ease off on the pumpkin in a couple of days i think.
thank you everyone for giving me advice. i was very concerned but i feel better now knowing that there is no bacteria or anything in her poop.