MICRO FARMING HOW-TO: Many of those involved in small scale farming and micro farming utilize various organic mulches. If you own a farm dog or cat, you may want to avoid cocoa mulch, an otherwise excellent mulch widely available.
It’s made from the shell waste caused by the extraction of chocolate from cocoa beans. It contains the same lethal pet ingredient called ‘theobromine’ that chocolate contains, which can cause sometimes deadly cardiac complications, including a racing or irregular heartbeat. — www.MicroEcoFarming.com