POPM 4230 - Dairy (lectures 3 - 6) with
Complete Solutions
What factors contribute to a drop in DMI around calving? - ANS-heat stress, social
changes, excessive dietary Changes and Crowding/ lack of feed access
development of mammary gland for lactation takes - ANS-~ 3 weeks
Rumen microflora adaptation takes - ANS-~ 10 - 14 days
What are some common periparturient diseases in dairy cows? - ANS-retained
placenta (RP), metritis, ketosis, displaced abomasum (DA), milk fever, and
endometritis, mainly occurring within the first four weeks postpartum.
What are the economic impacts of transition diseases? - ANS-Transition diseases
cause production losses, treatment costs, discarded milk, delayed pregnancies,
increased culling, and mortality, with direct disease costs ranging from $175-$450
per case.
What causes milk fever (clinical hypocalcemia) in dairy cows? - ANS-caused by a
rapid calcium demand for colostrum and milk production, which outpaces calcium
mobilization from bones, leading to hypocalcemia, especially in older cows
when dose MF happen in cows - ANS-3rd+ lactation
What are the clinical stages of milk fever in cows? - ANS-Stage 1: includes
unsteady movement and cool extremities
Stage 2: shows inability to rise, depression and head on
flank
Stage 3: involves lateral recumbency and bloat, leading to death.
How is milk fever treated in cows? - ANS-IV calcium for severe cases, with
subcutaneous or oral calcium for mild cases. Follow-up monitoring is essential to
prevent relapse or "downer cow" syndrome.
is full recovery possible in Milk Fever? - ANS-no, Relapse
How is hypocalcemia prevented in dairy cows? - ANS-includes limiting dietary
calcium prepartum, using calcium binders like zeolite, and applying a negative
DCAD diet to improve calcium mobilization at calving.
What is the role of a negative DCAD diet in preventing hypocalcemia? - ANS-
induces mild metabolic acidosis, enhancing calcium mobilization from bones and
increasing efficiency of calcium absorption around calving.
Complete Solutions
What factors contribute to a drop in DMI around calving? - ANS-heat stress, social
changes, excessive dietary Changes and Crowding/ lack of feed access
development of mammary gland for lactation takes - ANS-~ 3 weeks
Rumen microflora adaptation takes - ANS-~ 10 - 14 days
What are some common periparturient diseases in dairy cows? - ANS-retained
placenta (RP), metritis, ketosis, displaced abomasum (DA), milk fever, and
endometritis, mainly occurring within the first four weeks postpartum.
What are the economic impacts of transition diseases? - ANS-Transition diseases
cause production losses, treatment costs, discarded milk, delayed pregnancies,
increased culling, and mortality, with direct disease costs ranging from $175-$450
per case.
What causes milk fever (clinical hypocalcemia) in dairy cows? - ANS-caused by a
rapid calcium demand for colostrum and milk production, which outpaces calcium
mobilization from bones, leading to hypocalcemia, especially in older cows
when dose MF happen in cows - ANS-3rd+ lactation
What are the clinical stages of milk fever in cows? - ANS-Stage 1: includes
unsteady movement and cool extremities
Stage 2: shows inability to rise, depression and head on
flank
Stage 3: involves lateral recumbency and bloat, leading to death.
How is milk fever treated in cows? - ANS-IV calcium for severe cases, with
subcutaneous or oral calcium for mild cases. Follow-up monitoring is essential to
prevent relapse or "downer cow" syndrome.
is full recovery possible in Milk Fever? - ANS-no, Relapse
How is hypocalcemia prevented in dairy cows? - ANS-includes limiting dietary
calcium prepartum, using calcium binders like zeolite, and applying a negative
DCAD diet to improve calcium mobilization at calving.
What is the role of a negative DCAD diet in preventing hypocalcemia? - ANS-
induces mild metabolic acidosis, enhancing calcium mobilization from bones and
increasing efficiency of calcium absorption around calving.
