Question

A puppy was given 500g of a commercially‐produced kibble containing 35% crude protein(CP) on a DM basis.It excreted faecal matter of 150g DM containing 65g of protein/kg;

Calculate the apparent digestibility of the protein From this figure

Answer 1

Since, the amount of protein given to the puppy was 35% in 500g kibble

total intake of protein will be:

0.35 500g 165g

total protein in faecal matter = 65g/kg

In 1000g amount of protein is: 65g

thus, in 150 faecal matter, amount of protein:

65 1000 150 0.65 15 9.75g

Thus, apparent digestibility of the protein:

intake - faecal 1001 165 - 9.75 165 100 intake

AD-T65 * 100 = 94.1

Thus, the apparent digestibility of the protein is 94.1%