How old is Riley? Is he eating any solid food, yet? A parrot on formula will have more watery droppings than one who has made the transition to solid foods.
Can you give us a little more information? How old is your ekki baby, how long have you had him, and was his poop runny from the time you brought him home?
Depending on how 'watery' you make his formula, the stool WILL be much looser than birds who eat more solids.
IF in doubt, I'd always recommend having him checked out by an avian vet. Babies can go downhill rather quickly if there's an underlying problem, if you know what I mean.