Cypress blend is not 100% cypress; the 100% is because it's wood mulch and it's a blend of different woods. A few years ago I called the company that produces it and asked about its overall composition. It is 10% cypress, 50% pine, and 40% "whatever we were cutting that day" which could potentially include cedar or black walnut from what I was told. It is not a consistent product and they maker absolutely did not recommend using it as animal bedding.
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