Asian palm civet digestive juices enter into the beans and modify the micro-structural properties of these beans. Proteolytic enzymes cause substantial breakdown of storage proteins. Kopi Luwak is traditionally made from the faeces of wild civets, however, due to it becoming a trendy drink, civets are being increasingly captured from the wild and fed coffee beans to mass-produce this blend. Many of these civets are housed in battery cage systems which have been criticised on animal welfare grounds. The impact of the demand for this fashionable coffee on wild palm civet populations is yet unknown but may constitute a significant threat. In Indonesia,
Giling Basah called “luwak”. The coffee beans, still coated with mucilage, are then stored for up to a day. Afterwards the mucilage is washed off and the parchment coffee is partially dried for sale, retaining only 30% to 35% of the moisture content. Processors and collectors then hull the coffee in a semi-wet state, which gives the beans a unique bluish-green appearance. This method is thought to reduce acidity and increase body, resulting in the classic Indonesian cup profile. The Giling Basah process can create a "goat's foot," a split on one end, in green coffee beans. Sometimes the hulling machine partially