Cheese in the categorization of these cheeses is their age. Fresh cheeses without additional preservatives can spoil in a matter of days. Content (double cream, goat, ewe and water buffalo) Some cheeses are categorized by the source of the milk used to produce them or by the added fat content of the milk from which they are produced. While most of the world's commercially available cheese is made from cows' milk, many parts of the world also produce cheese from goats and sheep. Some cheeses are described by their fat content. Double cream cheeses are soft cheeses of cows' milk enriched
Flor de Guía cheese Origin. The curdling medium may be vegetable or animal depending on the type of cheese being made. Salt is added to the milk but not exceeding per 100 litres (galls) of milk. For Flor cheese, the vegetable rennet (liquid extract of the cardoon) is added when the milk has been heated to between 28 °C and 35 °C and maintained for 60 to 90 minutes. For Half-Flor cheese the curdling agent must be 50% cardoon juice and 50% another vegetable or authorized rennet. It is heated to 28–38 °C and maintained for a maximum of 1 hour. For Guia cheese