Hydrolyzed poultry feathers

Hydrolyzed Poultry Feathers is the product resulting from the treatment, under pressure, of clean, undecomposed feathers from slaughtered poultry, free of additives or accelerators. Not less than 75% of its crude protein content must be digestible by the pepsin digestibility method. 

Product obtained by drying and grinding waste from slaughtered poultry. The product must be substantially free of feathers Product obtained by hydrolyzing, drying, and grinding poultry feathers... 

Figure 18.5 shows the mean spectrum of pure poultry meals (n = 56), pure pork meals (n = 16), pure cattle meals n = 1), cattle-poultry meal mixture (n = 1), cattle-pork meal mixture (n = 3), poultry-pork meal mixture (n = 3), blood meal ( = 1), fish meal (n =8), hydrolyzed feather meal (n = 1), feather meal n = 1), and cattle-sheep-pork and poultry meal mixtures (n = 189). There are visible differences in the region 1680 to 1760 nm that may be the basis for differentiating among the different types of protein animal meals [11]. 

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