A Constipated Munchkin!

Looking for Smart Mama advice!!!!

We've had some bouts of constipation with my 2 1/2 year old. I'm not sure if its her diet or since she's just recently potty trained, she would rather not deal with pooping - she would rather continue playing instead. She'll end up going 2 or more days without pooping before I end up giving her Myralax in her milk which pretty much insures that she'll be pooping in hours.

Have you experienced this with your munchkin? Did you alter his/her diet? My munchkin is a picky - I should actually say stubborn - eater so getting her to eat new things often requires lots of energy and patience!

Please share!!!