I would be concerned about them consuming it, especially if it contains any scents. I think you'd have better luck trying fleece if you can get hold of it. It's what I use. My fleece collection has cost me maybe $75 total and that's a high estimate, but I have blankets in all different types and colors, enough to change the cage several times without washing the fleece. In contrast, over the four or five years before I started with fleece, I probably spent $1500 on bedding, and that's quite conservative, given I bought at least 2 bags a month. The fleece has lasted three years and will keep going. Kitty litter would get expensive quickly like any other bedding. Fleece is also more environmentally friendly in terms of waste.