peediatrician
A medical doctor who treats children with urinary issues, such as bed-wetting, being slow to progress in potty-training, etc.
Ethan Couch may indeed not have needed a peediatrician as a toddler, but his real problems began a bit later in his childhood development, when his **solid-matter waste** began colliding with the electric breeze-creator at regular intervals (in other words, what he preferred or liked did not comfortably "mesh" with what his fellow humans on the planet would have found tolerable or reasonable)!