ANIMAL SCIENCE FEEDSCALCULATIONS:

1.After learning the concepts of drymatter and as fed, you realize you have been spending a lot ofmoney on canned dog food and want to switch to dry food for yourpet. The canned food you have been feeding is 8% crudeprotein on an as fed basis, and the food is 78% moisture. The newfood you are considering is 28% CP and 12% moisture. How do these 2dog foods compare in protein as you decide whether to switch tothis new dog food?

2.Formulate 100 pounds of a mixed feedthat is 16% CP using corn and soybean meal. The corn is 87% DM, 9%CP on a DM basis. The soybean meal is 88% DM, 49% CP on a DMbasis. In this diet, you must add vitamins and minerals, soyou have to allow for 5% slack space. Remember, youmust calculate the ration on a DM basis, then convert to As Fedbasis (so you know how much of each feed to weigh to put in themixer). You are making the 100 pounds on a dry matter basis, soyour final amounts of corn and SBM will add up to be more than 100pounds on an as-fed basis.

3.A 600 kg horse doing moderate workhas a crude protein requirement of 2.57 lbs. of crude protein (CP)per day and a digestible energy (DE) requirement of 29.1 mcal of DEper day.

Use oats and grass/clover hay toformulate a diet for the horse. The oats contain 13% CP and 1.7Mcal DE/ lb and is 89%DM. The hay contains 18% CP and 1.1 Mcal DE/ lb on a DM basis, and is 90% DM.

Make sure to include how many pounds of oats and hay you willneed, both on Dry Matter basis and an As Fed basis.