My niece did this. She held it for whatever reason. I was thinking of glycerin suppositories before I read that far in your story. However, they only help to a point and most kids do not like you sticking things in their butts. Talk about psychological! She just grew out of it but my sister-in-law was beside herself. I think she made it worse. It's the last little bit of control these little ones have and they want to hang on to it. I think it's even a little normal, especially if the child fights for independence over so many things they cannot control. Things they may have inherited genetically. As you said, his mom had her challenges. Your love will get the little guy through. Fecal impactions are no treat to have removed. Let's avoid that at all costs. I am amazed at your dedication to raising this little guy as carefree and feeling loved as you possibly can. It's admirable, Lisa.