Hi there,
I have never had a dog with a motility disorder, but did just read article on PetMD, "
Stomach Disorder (Loss of Motility) in Dogs," n.d.
The difference between your standard and bland is chicken only with mashed vs rice, and lower mix of veggies (no kale or lima beans).
I am not a nutritionalist, but both diets "look" healthy to me. I don't think of kale or lima beans as being "rich."
So hope you can get to the bottom of this. Hope those more in the know will comment.