Hay Quality Calculator

This program calculates the percent of crude protein (CP) and total digestible nutrients (TDN) requirements met by hay for different classes of livestock. The nutrient requirements for each class of livestock are based on average levels of production in a thermo-neutral environment; it is important to monitor body condition, weight change, and environmental conditions to make dietary adjustments if needed. Up to six hay samples can be entered and compared for beef cows, stocker calves/heifers, horses, and sheep/goats. When the hay data are entered, click on the tab corresponding to the animal being fed. Values shown in green meet 90% or more of requirement for that animal. Values shown in red meet less than 90% of requirement for that animal. A nutritionist should be consulted for feeding recommendations when values do not meet CP or TDN requirements.

Enter the Hay Sample ID and forage test values for CP and TDN (Dry Matter Basis) in the spaces below for up to six different hay samples

Hay Sample ID	% CP	% TDN
Hay Sample ID 1	Percent of Crude Protein 1	Percent of Digestible Nutrients 1
Hay Sample ID 2	Percent of Crude Protein 2	Percent of Digestible Nutrients 2
Hay Sample ID 3	Percent of Crude Protein 3	Percent of Digestible Nutrients 3
Hay Sample ID 4	Percent of Crude Protein 4	Percent of Digestible Nutrients 4
Hay Sample ID 5	Percent of Crude Protein 5	Percent of Digestible Nutrients 5
Hay Sample ID 6	Percent of Crude Protein 6	Percent of Digestible Nutrients 6

Click on tabs below to see results for each Category

Values shown in red meet less than 90% of animal requirement. Consult a nutritionist for ration assistance.

Beef Cows	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN
Beef Cows	Hay ID 1		Hay ID 2		Hay ID 3		Hay ID 4		Hay ID 5		Hay ID 6
	0	0	0	0	0	0	0	0	0	0	0	0
1,000-lb Cow	Estimate percentage (%) of requirements met by this hay
Dry	0	0	0	0	0	0	0	0	0	0	0	0
Late Gestation	0	0	0	0	0	0	0	0	0	0	0	0
Lactation	0	0	0	0	0	0	0	0	0	0	0	0
1,100-lb Cow
Dry	0	0	0	0	0	0	0	0	0	0	0	0
Late Gestation	0	0	0	0	0	0	0	0	0	0	0	0
Lactation	0	0	0	0	0	0	0	0	0	0	0	0
1,200-lb Cow
Dry	0	0	0	0	0	0	0	0	0	0	0	0
Late Gestation	0	0	0	0	0	0	0	0	0	0	0	0
Lactation	0	0	0	0	0	0	0	0	0	0	0	0
1,400-lb Cow
Dry	0	0	0	0	0	0	0	0	0	0	0	0
Late Gestation	0	0	0	0	0	0	0	0	0	0	0	0
Lactation	0	0	0	0	0	0	0	0	0	0	0	0

Stockers / Heifers	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN
Stockers / Heifers	Hay ID 1		Hay ID 2		Hay ID 3		Hay ID 4		Hay ID 5		Hay ID 6
	0	0	0	0	0	0	0	0	0	0	0	0
400 lb Calf	Estimate percentage (%) of requirements met by this hay
1 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
1.5 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
2 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
500 lb Calf
1 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
1.5 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
2 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
600 lb Calf
1 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
1.5 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
2 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
700 lb Calf
1 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
1.5 lb adg	0	0	0	0	0	0	0	0	0	0	0	0
2 lb adg	0	0	0	0	0	0	0	0	0	0	0	0

Horses	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN
Horses	Hay ID 1		Hay ID 2		Hay ID 3		Hay ID 4		Hay ID 5		Hay ID 6
	0	0	0	0	0	0	0	0	0	0	0	0
Maintenance Only	Estimate percentage (%) of requirements met by this hay
Mature Horse (Maintenance)	0	0	0	0	0	0	0	0	0	0	0	0
Stallions	0	0	0	0	0	0	0	0	0	0	0	0
Working Horses
Light work	0	0	0	0	0	0	0	0	0	0	0	0
Moderate work	0	0	0	0	0	0	0	0	0	0	0	0
Heavy/Intense work	0	0	0	0	0	0	0	0	0	0	0	0
Breeding Mares
Pregnant Mares (Late Gestation)	0	0	0	0	0	0	0	0	0	0	0	0
Lactating Mares (0-3 Months post foaling)	0	0	0	0	0	0	0	0	0	0	0	0
Growing Animals
Weanling (4-6 months)	0	0	0	0	0	0	0	0	0	0	0	0
Yearling (12 months)	0	0	0	0	0	0	0	0	0	0	0	0
Long-yearling (18 months)	0	0	0	0	0	0	0	0	0	0	0	0
Two-year old	0	0	0	0	0	0	0	0	0	0	0	0

Sheep / Goats	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN	CP	TDN
Sheep / Goats	Hay ID 1		Hay ID 2		Hay ID 3		Hay ID 4		Hay ID 5		Hay ID 6
	0	0	0	0	0	0	0	0	0	0	0	0
Sheep	Estimate percentage (%) of requirements met by this hay
Ewe, Dry (110lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Dry (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Last Trimester (110lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Last Trimester (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Lactating (110 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Lactating (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Flushing (110 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Ewe, Flushing (154 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Lamb, Growing (66 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Goats
Doe, Dry (110lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Dry (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Last Trimester (110lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Last Trimester (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Lactating (110 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Lactating (154lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Flushing (110 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Doe, Flushing (154 lbs)	0	0	0	0	0	0	0	0	0	0	0	0
Kid, Growing (67 lbs)	0	0	0	0	0	0	0	0	0	0	0	0

This application was developed by the University of Arkansas Division of Agriculture Cooperative Extension Service (CES) to assist public users. This application uses data derived from other sources and does not guarantee the accuracy of that data. Sale of this application or use of it for purposes other than its intended use is strictly prohibited. Information put forth by this application is intended to be used in conjunction with close consultation with the appropriate Extension professional. The CES is not liable for damages resulting from recommendations made by this application and is not a substitute for prudent judgment. Information and calculated values provided through this application may not consider all possible details available for a given situation and should only be used as a guide. CES does not warrant or guarantee the performance of this application nor the service offered. User’s utilize this information at their own risk.