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=== Overview ===
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== Overview ==
    
'''Dry pet foods are made by mixing dry and wet ingredients together to form a dough. In the extrusion process, the dough is heated under pressure, then pushed through a die machine that cuts the kibbles.''' Kibble size and shape varies according to the product specification. The kibbles are dried, cooled and spray coated. Some dry foods may also be produced by means other than extrusion, such as baking.
 
'''Dry pet foods are made by mixing dry and wet ingredients together to form a dough. In the extrusion process, the dough is heated under pressure, then pushed through a die machine that cuts the kibbles.''' Kibble size and shape varies according to the product specification. The kibbles are dried, cooled and spray coated. Some dry foods may also be produced by means other than extrusion, such as baking.
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== Ingredient Selection and Sourcing ==
=== Ingredient Selection and Sourcing ===
      
Many of the [[Common Ingredients Used In Pet Food|ingredients used in the manufacture of pet food]] are described as animal (or fish) derivatives or by-products. These ingredients are the parts of the animal surplus to the requirements of the human food industry. In dry pet foods, '''animal derivatives are commonly used in a meal form''' (such as chicken meal, poultry by-product meal) where meat and animal derivatives are cooked, the fat removed and the remaining material dried to create a dry meal). By-products may also be used in fresh or frozen form. Many of the other ingredients such as cereals, grains, and vegetables used in dry pet foods come in dry form and are milled or ground prior to mixing. A recipe is also likely to include oils and [[Fats - Nutrition|fats]], [[Vitamins - Nutrition|vitamins]] and [[Minerals - Nutrition|minerals]] required to ensure the product delivers all the essential nutrients.
 
Many of the [[Common Ingredients Used In Pet Food|ingredients used in the manufacture of pet food]] are described as animal (or fish) derivatives or by-products. These ingredients are the parts of the animal surplus to the requirements of the human food industry. In dry pet foods, '''animal derivatives are commonly used in a meal form''' (such as chicken meal, poultry by-product meal) where meat and animal derivatives are cooked, the fat removed and the remaining material dried to create a dry meal). By-products may also be used in fresh or frozen form. Many of the other ingredients such as cereals, grains, and vegetables used in dry pet foods come in dry form and are milled or ground prior to mixing. A recipe is also likely to include oils and [[Fats - Nutrition|fats]], [[Vitamins - Nutrition|vitamins]] and [[Minerals - Nutrition|minerals]] required to ensure the product delivers all the essential nutrients.
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=== Ingredient Weighing and Preparation ===
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== Ingredient Weighing and Preparation ==
    
Ingredients are carefully selected according to a pet food manufacturer’s specific recipe, formulated to deliver complete and balanced nutrition for cats and dogs. Dry ingredients are ground and sieved where required and then mixed.
 
Ingredients are carefully selected according to a pet food manufacturer’s specific recipe, formulated to deliver complete and balanced nutrition for cats and dogs. Dry ingredients are ground and sieved where required and then mixed.
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== Cooking and Cooling ==
=== Cooking and Cooling ===
      
The dry mix is combined with wet ingredients, water and steam in a preconditioner, which hydrates the powders, creates a dough and starts the cooking process. The dough then enters a machine known as an extruder, which cooks the dough under pressure. At the end of the extruder the dough exits under pressure through a die plate creating ribbons of pre-specified shape that are then sliced into the pre-specified size using a rotary cutter.
 
The dry mix is combined with wet ingredients, water and steam in a preconditioner, which hydrates the powders, creates a dough and starts the cooking process. The dough then enters a machine known as an extruder, which cooks the dough under pressure. At the end of the extruder the dough exits under pressure through a die plate creating ribbons of pre-specified shape that are then sliced into the pre-specified size using a rotary cutter.
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When baked, the dough is rolled out and cut into shapes, then baked in an oven (similar to cookies or biscuits).
 
When baked, the dough is rolled out and cut into shapes, then baked in an oven (similar to cookies or biscuits).
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== Kibble Coating ==
=== Kibble Coating ===
      
After drying and cooling, kibbles often enter a revolving drum where they are evenly coated with a mix of flavours to enhance taste, and preservatives to prevent spoilage through the shelf life of the food. Flavours or other coatings may also be sprayed on baked foods as they exit the oven.
 
After drying and cooling, kibbles often enter a revolving drum where they are evenly coated with a mix of flavours to enhance taste, and preservatives to prevent spoilage through the shelf life of the food. Flavours or other coatings may also be sprayed on baked foods as they exit the oven.
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== Packaging ==
=== Packaging ===
      
Packs are filled according to the declared weight and the packaging is appropriately sealed to prevent contamination.
 
Packs are filled according to the declared weight and the packaging is appropriately sealed to prevent contamination.
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== Storage and Distribution ==
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=== Storage and Distribution ===
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Packages are stored in boxes or wrapped on pallets and stored in warehouses ready for distribution to customers.
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Packages are stored in boxes or wrapped on pallets and stored in warehouses ready for distribution to customers.
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{{Reviewed Nutrition 2
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|author = [[Abi Stevenson|Dr Abi Stevenson]]
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|editor1 = [http://regulatorydiscretion.com/Page_3.html Dr David A. Dzanis]
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|editor2 = [[Sarah Abood|Dr Sarah K. Abood]]
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|date = April 2017
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}}
    
[[Category:To Do - Nutrition]]
 
[[Category:To Do - Nutrition]]
 
[[Category:Pet Food Manufacture]]
 
[[Category:Pet Food Manufacture]]
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