Today i did not eat breakfast.I had a quick lunch of a pop tart and a quart of choc milk?

I did eat good dinner.Fish,noodles and mixed veggies right after dinner which i know was not digested yet i had loose bowel movement is this normal considering what i ate for lunch? which like i said was mostly liquid? I most of the time eat better than this,but today i was busy and did not have time to eat healthy> I feel fine and i have not been back in the bathroom after this happened!---Thanks Mike---