Kelley-
You can try a soak in very shallow very warm water for 10 minutes or so - sometimes that will trigger a bowel movement.
Ground walnut shells are a big no. Disregard whatever the packaging says - it's not safe for them to ingest. There can be dangerously sharp edges on the particles.
If you want to get away from the millet, you can do fine natural sand (washed playsand). Make sure it isn't crushed gravel sand as those have rough edges and can possibly interlock, forming clumps in the digestive tract. Other people use soil mixtures, but I've never done that, so don't have advice one way or the other - a search of past posts can tell you a lot.
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Torey
Eugene, Oregon, USA
1.1 Saharan Uros (Joe and Arthur)
3.1 Mali Uros (Spike, Turtle, Tank, and Lilly)
1.1 Ornate Uros (Scuttlebutt and Shazzbot)
2.1 Green Anoles (Bowser, Sprocket, Leeloo)
1.1 Felis domesticus (Roscolux and Jenny)
