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A dog's requirements for protein increases as a result of a reduced ability to synthesize proteins as it ages. [3] As a result, it is extremely important to not restrict protein consumption to a senior dog as it can be as just as harmful as protein deficiency in young dogs. [3]
[39] [40] A given wet food will often be higher in protein or fat compared to a similar dry food on a dry matter basis (a measure which ignores moisture); given the canned food's high moisture content. A larger amount of canned food must be fed in order to meet the dog's required needs.
Powders will all have a residual moisture content in the 4-8% range. Fish protein concentrate (FPC) - is a powder concentrate with medium level of protein (50-70%) and will contain some level of fat/oil (1-20%) in the powder form as well. [7] Fish protein isolate (FPi) - where the product contains less than 1% fat/oil and more than 90% protein.
Natural protein concentrates (often used in bodybuilding or as sports dietary supplements): Soy protein isolate (prepared with sodium or potassium): 80.66; Whey protein isolate: 79; Egg white, dried: 81.1; Spirulina alga, dried: 57.45 (more often quoted as 55 to 77) Baker's yeast: 38.33; Hemp husks 30
The formula for calculating the PDCAAS percentage is: (mg of limiting amino acid in 1 g of test protein / mg of same amino acid in 1 g of reference protein) x fecal true digestibility percentage. [2] The PDCAAS value is different from measuring the quality of protein from the protein efficiency ratio (PER) and the biological value (BV) methods. [3]
Prior to 1910, fish meal was primarily used as fertilizer, at least in the UK. [2]Fish meal is now primarily used as a protein supplement in compound feed. [2] [3] As of 2010, about 56% of fish meal was used to feed farmed fish, about 20% was used in pig feed, about 12% in poultry feed, and about 12% in other uses, which included fertilizer. [1]
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Protein should account for at least 25% of energy; however protein requirements also depend on the digestibility of the protein and age of the puppy. [29] Amino acid and nitrogen requirements decrease between 10–14 weeks, indicating that different protein levels are often beneficial before and after 14 weeks of age. [ 6 ]