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Additives in pet food serve various purposes: The first one is to provide nutritional benefits, e.g. vitamins. The second purpose concerns technological additives for safety and maintaining the desirable features of texture, stability and resistance to spoilage and lastly there can be sensory additives providing the colour and flavour.
添加剂在宠物食品中有多种用途：第一个是提供营养，例如维生素。第二个用途是技术型方面的，如：保证产品安全性、保持理想的质地、保持状态稳定和防腐，最后是改善感官的添加剂，比如提供颜色和风味。
The term ‘additive’ can be applied to a range of ingredients that manufacturers add to the basic ingredients that are at the heart of pet food. These minor ingredients include mainly essential nutrients such as vitamins and minerals, but also flavours, colours and agents to prevent harmful spoilage of the pet food due to fats going rancid or through bacterial contamination.
“additive”一词也可用来表示一堆预混料，这些预混料是宠物食品的核心原料。这些微量的原料主要包括必需营养素（如维生素和矿物质），也包括风味剂、色素和能防止宠物食品因为脂肪氧化酸败或细菌污染变质的物质。
Vitamins and minerals are presented in the factsheet ‘Nutritional needs of Cats and Dogs’.
维他命和矿物质的内容记载于“猫狗的营养需要”的资料页。
Pet food safety is of critical importance. Preservatives may be added, largely depending upon the type of pet food product and processing, to ensure that food products remain nutritious and safe for consumption throughout their shelf life. The food must be protected from bacterial or mould contamination and spoilage, further it must be protected from degradation and the loss of nutrients during storage. The method of preservation used depends on the type of food because the way of processing also contributes to the food integrity and shelf life:
宠物食品的安全至关重要。可能会添加防腐剂，确保食品在整个货架期内仍保持营养和安全，是否添加主要取决于宠物食品产品的类型和加工方式。食品的保存方法取决于食品的种类，因为加工的方式也有助于延长保质期:
Dry pet food: The manufacturing process kills microbes and the low moisture content helps to inhibit the growth of most organisms.
干性宠物食品：生产过程杀死微生物，低水分含量有助于抑制大多数微生物的生长。
Moist pet food: The heat applied in cooking of canned or pouch pet food kill microbes and the packaging excludes air, protecting the food.
湿性宠物食品：罐装或袋装的湿粮经过热处理杀菌以及真空排气来保护食品。
Chilled pet food: Processed chilled pet food has undergone a controlled thermal process and this, together with refrigeration during storage helps suppress spoilage.
冷冻宠物食品：冷冻宠物食品经过热处理后再辅以冷冻保存延长货架期和抑制腐败。
Semi-moist pet food: This generally has a low pH and contain humectants that bind water to the product, making it less available for use by invading organisms.
半湿性宠物食品：这种食品通常pH值较低，并添加能结合自由水的保水剂，使其不易被微生物利用。
