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Rumen Upset & Acidosis: Why Beef Cattle Suddenly Stop Thriving

Rumen Upset & Acidosis: Why Beef Cattle Suddenly Stop Thriving

If cattle are eating but not gaining, or performance drops off quickly after a ration change, the problem often sits in one place:

The rumen.

In Irish beef systems, rumen upset and sub-clinical acidosis are far more common than most realise — especially during finishing or after turnout to strong spring grass.


The Rumen: Your Real Feed Engine

The rumen is a fermentation chamber packed with billions of microbes. These microbes break down fibre and starch into usable energy.

When the rumen is stable:

  • Intake stays strong

  • Feed converts efficiently

  • Daily liveweight gain stays consistent

When the rumen is unstable:

  • Intake fluctuates

  • Dung loosens or becomes inconsistent

  • Thrive disappears

And once rumen bugs are knocked back, performance doesn’t recover overnight.


What Causes Acidosis?

Acidosis happens when rumen pH drops too low due to rapid fermentation of starch or sugars.

Common triggers on Irish farms include:

  • Sudden introduction of high levels of barley

  • Pushing concentrates too quickly in finishing cattle

  • Inconsistent feeding times

  • Sudden turnout onto lush, leafy grass

  • Feeding large amounts of straights without proper balance

Barley ferments fast. If it’s increased too quickly, acid builds up faster than the rumen can buffer it.

Even when cattle don’t show obvious illness, sub-clinical acidosis quietly reduces performance.


Signs You Might Be Missing

Not every case is dramatic. Watch for:

  • Cattle going off feed for a day or two

  • Loose, bubbly dung

  • Reduced cud chewing

  • Lameness in severe cases

  • Cattle that “stall” during finishing

If daily gain drops from 1.4 kg to 0.9 kg, the cost builds quickly.


Why It’s So Expensive

When rumen pH drops:

  • Fibre digestion falls

  • Feed efficiency collapses

  • Cattle burn energy dealing with inflammation

You end up feeding more to get less.

No ration can perform if the rumen environment is unstable.


Practical Prevention That Works

Acidosis is largely a management issue.

Key rules:

  1. Introduce ration changes gradually — over weeks, not days.

  2. Increase concentrate levels in small, steady steps.

  3. Keep feeding times consistent.

  4. Always provide access to clean water.

  5. Ensure adequate fibre, even in finishing systems.

Consistency beats pushing cattle too hard.


Nutrition Done Properly

Balanced rations reduce risk by combining:

  • Fast-release energy

  • Slower-release starch sources

  • Digestible fibre

  • Rumen buffers

  • Live yeast where appropriate

At Crecora Mills, rations are formulated to support rumen stability first — because performance only comes after digestion is right.

You cannot out-feed a damaged rumen.


The Take-Home Message

If cattle stop thriving after a diet change, don’t blame genetics or weather straight away.

Look at:

  • Rate of feed increase

  • Starch levels

  • Feeding consistency

Protect the rumen and performance will follow.

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Smart Calver

Smart Calver

Another quality product from Crecora Mills

“We only mix with the best”

The most stressful time for any farmer is the period around calving season. With so much potential for problems around this area we have been working hard to make this time as easy, profitable and stress free as possible.

Using our hands on knowledge and practical experience in dealing with cows before calving we are delighted to bring Smart Calver to our customers.

Smart Calver is our latest innovative product to come to the market and it is based on a high protein (18%) and high energy formulation (PDIE 125grms per kilo) with a top class pre calver mineral pack included.

As with all of our high energy feeds there is a large amount of high quality cereals included in Smart Calver such as Maize, Barley and Oats.

 

Reasons to feed Smart Calver

  1. Provide the cow and calf with the vital balanced minerals to help prevent health problems and costly vet bills.
  2. Provide a high energy feed to ensure the cow has enough energy to get through the calving process with the minimum of outside help.
  3. Provide a balanced diet to allow the cow to return to full production as fast as possible.

Smart Calver ingredients include: Maize, Maize Gluten, Barley, Oats, Rapeseed, Soya Hulls, Hi-Pro Soya, Distillers Grains, Palm, Minerals and Molasses.

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Call us on 061 355186 or talk to your local Sales Representative for more information

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News

Dairy Seminars Jan 2015

Our annual early season dairy seminars are taking place this week.
The venues are Listowel in the Listowel Arms on Tuesday the 13th at 8pm and Adare in the Woodlands house hotel on Thursday the 15th at 8pm.
We have managed to secure some great well known and respected speakers for each session with a practical knowledge of the Irish dairying and the issues that come with it.
Among the topics our customers have asked the speakers to discuss are:
World Milk Markets and price.
Dairy nutrition in a post quota scenario,
Issues around calving
Cow nutrition in early lactation.
For those of you who have attended these meetings before you know that there is plenty of room for a back and forth discussion on these topics and questions are welcome.

As always we hope that we can solve some problems and give some guidance on what promises to be a challenging year.

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News

This winter will be the Perfect storm for problem calving

With Winter well upon us lets have a look at some issues that are bound to crop up on farm over the next few months.

In a “Normal” year we would be looking at cows having gone through a long lactation and consequently would be slipping into a slightly thin body condition. This year it looks like will be the perfect storm for problem calving due to over conditioned or fat cows (B.C.S 3.5 to 4)

Its commonly thought that on farm calving difficulties with a fat cow are due to a big calf size. Scientific evidence has proven that rather the cow is over conditioned and consequently does not have as much room in her body and birth canal for the calving process. This can lead to difficult calving, ceasarian sections animal health problems and lost calves and cows.

The size of the calf is determined by the genetics of the cow and bull mostly, only a very small part of calf size is feeding.

This year because of the huge amounts of grass available and the majority of cows drying off early, cows are being housed in higher Body conditions than ever before. This long dry period and good fodder could lead to serious problems with fat cows at calving. That is why I worry so much about this “Perfect Storm”

What happens in a lot of problem cases that I have seen is farmers don’t take action early enough. They wait till 3 or 4 weeks before calving to properly asses Body condition and panic when they realise the cow is a little fat. Then they drastically cut her feed intake in an effort to get her to lose body condition score. This is a very risky proposal that causes multiple problems on farm every year and this is why:

If the cow is too fat 3 to 4 weeks before calving it is generally too late to do anything about it. If you starve the cow all you will do is cause her to try to calve down with no energy reserves in her body. She needs a huge amount of energy at calving for successful calving process, colostrum production, fighting off infection and producing a healthy calf. Cutting off her energy supply so late just leaves her open to problems with all the aforementioned issues. (Ask me how I know this and I will tell you that unfortunately I have found out the hard way)

Ironically the best thing to do with a fat cow in the 2 weeks before calving is to feed them a high energy feed such as SmartCalver 18 to give the cow a chance to get through what will be a difficult process due to her body condition. She will not put on any more condition in the month before calving no matter what you offer her as her feed intake ability is cut by her increasing womb size and consequent rumen size reduction.

The best advice to save yourself money, time, and the hardship and stress is to try the following few tips.

Stand back from your cows today and try to look at them impartially. Are they too fat or thin? Allow that they will lose at least 0.25 of a body condition score in the last 2 months before calving no matter what you feed them as their feed intake reduces. Consider asking a qualified experienced neighbour or professional for a second opinion.

Can you group your cows using their due dates and feed them accordingly?

Can you provide 2 kilos per head of a high energy feed with a pre-calver mineral to those cows that are 3 to 4 weeks from calving to ease the calving process?

Do you have access to silage from fields with low potash values for these cows before calving? This will help to reduce incidence of Hypocalcaemia.

Are your calving facilities ready for the calving season?

Hopefully these few little tips can go some way to help you along the path of a successful and stress free calving season. But just remember it is the decisions you make today that will determine how your season goes.

We are available for any technical help for our customers if you feel you need it after reading this, please don’t hesitate to call us your local sales representative or the head office on 061 155186. Or fill in the contact form below.

We are here to help.

Paul O’Connell

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Crecora Mills

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