my toddlers poops have been messy. could it be from my breast milk?

Angela • Momma to 2 bio sons and 1 adopted daughter. 3rd pregnancy, 4th baby!

thick and gooey poos, kind of yellowish like baby poops. the logical side of me is thinking it's just a bug but I'm also coming up on my third tri and my milk has started to become more colostrum-like. he only nurses once a day and has been having a few gooey poops a day for 3 days now. cut out dairy thinking he might have developed an intolerance to it but that wasnt it. not sure what to do now other than wean. anyone else go through this?