Do all animals require protein in their diets?



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    All animals do indeed need protein in their diets, but necessary levels and types of essential protein may vary depending on the animal. Animals use both non-essential proteins (proteins the body can produce on its own) and essential proteins (those that animals own body cannot manufacture). High producing animals, such as dairy cows or chickens, have a higher protein requirement than low producing animals. There are various types of amino acids (the chemicals proteins are made of), and different animals have different amino acid requirements. For example, monogastric animals (pigs, horses, dogs, cats, chickens, etc.) need essential amino acids such as cystine and methionine.

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