There are actually two other bedding materials mentioned in the 14 Day Worm Castings
eBook which will also work. The problem that exists is consistency in different products.
Take for instance a product called Black Kow
. It is readily available nationwide. The company stresses they do not add materials other than what the cow eats. One such item they specify they do not ad is sand. However every bag I have found locally is loaded with sand. I even went as far as contacting the company and they informed me this should not be. In fact their own web site states they do not add any sand.
Now the same product sold in Texas is a pure product with no sand and is more like a peat moss.
The best material is a fully composted organic material however in some areas this can also be difficult to find.
I will keep you posted as I hope to hear back fro Black Kow and why what they promote is loaded with sand and in the meantime they state has no sand added.