Mom, hello, I have a problem. Sorry for the details right away. Our ch…

Mom, hello, I have a problem. Sorry for the details right away. Our child is 1.3 years old and has been having diarrhea for three days in a row, about 2-3 times a day (we're not breastfeeding anymore). It's mushy and pink, we haven't eaten any coloring food, except for his milk shake at night (he can't do without it) which is strawberry flavored. Maybe that's why? He used to drink other flavors and this hasn't happened before. But these days it started, or maybe it's something completely different? Has anyone experienced this?