Hey there! Good job trying to mix the food; it’s definitely less stressful on the hedgie to switch slowly. With that being said, if your hedgie ends up favoring the new over the old right off the bat, there’s not too much to worry about on that note. As far as the poop goes, I would be more concerned if it was a greensish color. The diet should definitely be high protein (30-35%) and fairly low fat (10-20%) which should ease the poop color. Just make sure it’s still somewhat moist- not completely dry, but also not totally runny.
Hope this helps 🙂