What caused my diarrhea?

I don't have any pain, or vomiting at all. I went to the bathroom cause i had to go #2 but then i was just diarrhea. I don't have any pain that is normally ociated with it. Yesterday i ate oragne juice and cereal for breakfast then ate kfc for dinner. I also did drink cranberry juice and another orange juice yesterday as well. This morning i had cereal, eggs, and a biscuit and oj and then drank an apple juice with dinner (kfc again). Could it be the juice and will it just be that one time i just went.