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Let’s start with some expert advice from ILRI…
Milk fever is caused by slow calcium absorption during calving
When a cow is calving she will lose a lot of calcium from her blood into the milk. The cow will need to start absorbing more calcium from her bones and feed to replace the lost calcium. If a cow cannot absorb calcium quickly enough then she will get sick. This is milk fever.
Most cases occur between 48 hours before calving and 72 hours after calving. Milk fever is rare for first-calf heifers but becomes higher with each new calf.
Though some farmers may think the opposite is correct, it may be important to reduce the calcium intake of affected cows before calving…
Prevent milk fever by reducing calcium intake in the 3 weeks before calving
If you feed your cow too much calcium during the dry period then you will slow down her rate of calcium absorption. When she calves it will take her a couple of weeks to increase her rate of calcium absorption back up to the right levels. In the meantime she will become calcium deficient.
The daily requirement of a 600kg pregnant dry cow is about 40 grams of calcium and 30 grams of phosphorus.
Top Q&A from AFC members
Franche asked a key question relevant to many farmers…
What causes a cow to fall after giving birth.. Being unable to stand n what should I feed it not to occur again?
A top answer we’ve selected comes from James…
Your cow falling down could be due to milk fever, injury to nerves or fracture.
How was calving process, smooth or laboured? How many times have it calved? What’s it’s demeanor?
Our AFC opinion on this topic
If the problem is milk fever then avoid feeding it any high calcium salts during the dry period. If you are using salts then buy those that are specifically for dry cows.
Do not feed dry cows excess legumes or alfalfa as they are high in calcium. Grass hay, silage, cereals and maizestalks are all low in calcium and safe to feed to dry cows.
It is key for farmers to understand the stages of milk fever…
The stages of milk fever
First 1 hour of milk fever: Standing but wobbly or twitching. Loss of appetite. Cold ears, dry mouth.
Next 1-12 hours of milk fever: Down on chest and drowsy
After 12 hours of milk fever: Down on side and unresponsive
Top Q&A from AFC members
Philip asked a key question relevant to many farmers…
I am a vet and often meets pregnant cows that will go down at almost eight months with poor response to calciject administration, who has handled the same and came up with good results?
A top answer we’ve selected comes from Sammi…
Milk fever aproach depends on its stage.The amount to inject i.v depends on the live weight of the cow to avoid calcium poisoning
At 1st stage oral calcium like animatic calcium from osho chemicals 100mls per day plus a good D.C.P helps.
Consider oral calcium…
1 in 3 cows who get a calcium injection for milk fever will relapse in the following hours or days. Using oral calcium after the injection can reduce the chance of a relapse by 60%.
Real Farmer Stories
Betty’s experience with Milk fever…
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