UPDATE! So it's been two weeks after switching over to raw lunch and kibble dinner, and all this time Roux's poop has been completely normal!
The pellets she makes from raw food is surprisingly compact and low odor. She's had chicken wings, beef, pork, mackerel, tilapia, and salmon, plus side dishes of egg, veggies and fruit, with a sprinkling of BARF supplement powder.
I did wind up taking her off of Orijen Puppy, which seemed to be causing more soft-serve than Nutram, and now she's on Wellness Core and Nutram T25 with pinches of Castor & Pollux, Spring Naturals, Merrick, and other grain-free formulas (I get sample packs free from the shop ). The kibble poop is a little softer than the raw poop, but completely normal and easy to pick up.
For treats she gets dried meats, a small amount of cat food kibble for training, and human goodies like yogurt or kitchen scraps like zucchini ends. For chews she has a dental stick once a week and every day I'll give her a hunk of frozen raw lamb or pork femur to alleviate the teething pain. And that old yak cheese stick is still there, even though she works on it in her crate sometimes. That thing is shortening very, very slowly.
I'm just happy we've finally got control on the number 2 situation... I was worried she was uncomfortable or at least wasn't absorbing properly. Perhaps it was just too much rich kibble? Not sure what the reason is here, but thanks for the help and support everyone!