Businesses in this category manufacture prepared food intended for domestic pets, principally dogs and cats, as well as products for other companion animals such as birds, fish and small mammals. They select and process ingredients including meat, fish, cereals, vegetables, oils, vitamins and minerals, then formulate recipes to suit different species, life stages and feeding needs. Products may be described as complete foods, designed to provide a pet's daily diet, or complementary foods, intended to be fed alongside other food. Manufacturing can involve cooking, mixing, grinding, drying, extrusion, canning or sealing food in trays and pouches. The resulting products include dry kibble, wet meals, pts, treats and some raw or frozen prepared foods. Producers may also make specialist diets, such as foods for particular sensitivities or veterinary use, subject to appropriate formulation and labelling.