She drinks tons of milk, juice, and water... but since she started on baby food at about 6 months, she's always had a hard time with her bowel movements. Sometimes they are so hard and dry they almost crumble. But her MOTHER was exactly the same way (I remember massaging her butt trying to get it out when she was just 4-5-6 months old), I don't remember it lasting this far into the toddler years tho. Nana holds her against her chest with her legs drawn up, that seems to help quite a bit... and it's not every time that she has difficulty, but it is almost always hard, regardless of the effort she has to put forth to get it out.

Honestly, I haven't looked at the ultra-sonic thing... my mom suggested it for my daughter's moles, so I thought I would pass it on. Mom did have a bad mole problem, and the ultrasonics worked for her.