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ANSC 3010 Dairy Nutrition
(Calves and Heifers) With Correct
Answers Graded A+
Dairy Calf phases Ans: Birth
Pre-weaning
Post weaning
How long does post weaning last? Ans: 3 months to 6 months
•Breeding to 2 mo before calving
•Last 60 days gestation
What is colostrum Ans: First and most important feed given to newborn calf
Dependent on passive transport
The primary source of nutrients
What is colostrum dependent on? Ans: passive transfer maternal
lmmunoglobulins from colostrum
Colostrum is the primary source of Ans: nutrients
colostrum provides essential and irreplaceable Ans: antibodies
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True colostrum obtained from Ans: first milking only
Milk from later milkings is inferior - milking is essential Ans: inferior - milking
is essential
Colostrum quality Ans: Determined by diseases or vaccinations of the cow
Ig content ranges form 2 to 23%
Colostrum quantity Ans: First feeding: 4 to 5% of birth weight (3 quarts on
average)
Colostrum Timing Ans: As soon as possible
Closure of gut
24 to 36 hours
Determining Colostrum quality Ans: Colostrometer- based on specific gravity
Brix refractometer (Calf's blood)
18-lb rule (also appearance)
Sources of liquid feed Ans: Excess colostrum or transitional milk
Fermented (sour) colostrum
Whole milk
Why shouldn't you feed fermented colostrum for first 48? Ans: Fermentation
may destroy lgs or cause digestive upset in newborn
ANSC 3010 Dairy Nutrition
(Calves and Heifers) With Correct
Answers Graded A+
Dairy Calf phases Ans: Birth
Pre-weaning
Post weaning
How long does post weaning last? Ans: 3 months to 6 months
•Breeding to 2 mo before calving
•Last 60 days gestation
What is colostrum Ans: First and most important feed given to newborn calf
Dependent on passive transport
The primary source of nutrients
What is colostrum dependent on? Ans: passive transfer maternal
lmmunoglobulins from colostrum
Colostrum is the primary source of Ans: nutrients
colostrum provides essential and irreplaceable Ans: antibodies
, 2|Page
True colostrum obtained from Ans: first milking only
Milk from later milkings is inferior - milking is essential Ans: inferior - milking
is essential
Colostrum quality Ans: Determined by diseases or vaccinations of the cow
Ig content ranges form 2 to 23%
Colostrum quantity Ans: First feeding: 4 to 5% of birth weight (3 quarts on
average)
Colostrum Timing Ans: As soon as possible
Closure of gut
24 to 36 hours
Determining Colostrum quality Ans: Colostrometer- based on specific gravity
Brix refractometer (Calf's blood)
18-lb rule (also appearance)
Sources of liquid feed Ans: Excess colostrum or transitional milk
Fermented (sour) colostrum
Whole milk
Why shouldn't you feed fermented colostrum for first 48? Ans: Fermentation
may destroy lgs or cause digestive upset in newborn
