My 4 yo was poop trained before he even turned 2!  He had chronic diarrhea which ended up being a milk protein allergy.  He could even get to the potty EVERY time as a 2 year old.  Lately he has been holding his poop and then messing.   Took to dr. Xray done- was backed up.  Cleaned him out with enema and miralax.  Increased fruits/veggies/ water.  Miralax reg. basis.  Toilet training- sit on potty after meals and do "pushes" with stool under feet.  Every once in a...