I went to Mcdonalds at 9:24am and ordered the 2for2 order which was bacon, egg and cheese biscuits and a yogurt parfait. I ordered one biscuit w/o bacon. The manager gave me my food and assured me one of the sandwiches had no bacon and he gave me an extra parfait bc "they made an extra one by mistake". All of the sandwiches had bacon. I called the store to make a complaint and the same manager offered me a free breakfast or lunch tomorrow. I ate one of the parfaits and placed the other in our commercial refrigerator for tomorrow. I opened my parfait today around 12:15 and placed my nuts from the package in the container, took my McDonald's spoon and began to stir. I was shocked when I found a small black bug enjoying a swim in my parfait.