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Addressing health and variable growth rate

Sponsored by ForFarmers

Many small changes have added up to a big improvement to the calf rearing system at Wood Park Farm, Liverpool.

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Wood Park Farm may be part of the School of Veterinary Science at the University of Liverpool, but obviously this does not give its livestock immunity from all the usual disease challenges which face any dairy farm.

 

In fact, farm manager John Cameron reflects on a very typical sequence of events as the herd of Holsteins increased in size from about 100-head in the early 2000s, to 220-head today.

 

He says like so many expanding herds, certain parts of the enterprise gradually outgrew the facilities. This was the situation in the calf rearing unit, which gradually became more heavily stocked and experienced progressively more disease.

 

Mr Cameron says: “The old calf buildings were simply being over-used. We did not have the opportunity to empty sheds between batches of calves, the ventilation was not purpose designed and the disease challenge faced by calves became overwhelming.

 

“Scouring was a regular feature and investigations revealed a key cause of this was cryptosporidium.”

 

With little effective treatment available for this protozoal infection, he says the main therapy at the farm’s disposal was fluid and electrolyte replacement.

 

“Calves were certainly dehydrated, their performance was knocked back and we were always conscious the damage caused by scouring could have an impact on life-long health and performance.”

 

The university farm took the decision to tackle the situation by overhauling its calf rearing enterprise and protocols, at the heart of which was a move away from the old buildings and into calf hutches.


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Hutches

 

Mr Cameron says: “This change was made about 18 months ago, and because of the farm’s teaching and research function, we tried a collection of hutches from five different manufacturers.

 

“Students undertook tests on each of the hutches, including using smoke bombs to monitor ventilation, and we have identified one hutch with a roof vent which seems superior to the others.”

 

Calves remain in individual hutches until two weeks of age, then they are moved on to group hutches until they are 12 weeks old.

 

He says: “Other changes include calf jackets for baby calves in hutches. And we have also built home-made verandas over the entrances of group hutches to protect calves from the weather.

 

“I hate to see them looking wet and bedraggled. It cannot be doing them any good.” Colostrum quality and management have also improved, achieved, in particular, by better nutrition in dry cows.

 

“By increasing protein in their ration, we have found colostrum quality has improved,” Mr Cameron says, observing these are 11,500-litre cows (3x) which are working hard through their lactations.

 

“We measure it on-farm with Colostro Balls, which give an indication of quality by whether they float. Students have backed this up by taking blood from calves and testing immunoglobulin levels.”

 

As a long-term customer of ForFarmers, the team at the farm took the opportunity to upgrade to a new feed range, switching to a calf milk replacer which includes a specialist health care package called Care+.

 

Rachel Kennerley, ForFarmers’ youngstock specialist, says: “We knew calves at Wood Park Farm were classic examples of stock which would benefit from the Care+ package in the new VITAMILK Omega Gold, as this has been developed with calf health at its core.

 

“The package includes the herbs eucalyptus, pine, mint, fenugreek and echinacea, which have been shown to help improve gut and respiratory health and boost overall immunity.”

Benefits

Benefits

“Benefits of components of the package have been demonstrated specifically against cryptosporidia and coccidiosis, which is particularly important when, as an industry, we are trying to reduce antimicrobial use.

 

“The calf milk replacer itself is whey-based and supplies high levels of digestible protein, along with a range of four oil sources for optimum digestibility.

 

“With the optimum quantity of minerals, vitamins and trace elements as part of the package, it can achieve optimal growth while supporting digestive function.”

 

This nutritional change is backed up by a switch to the premium VITA Start creep feed, which contains the live yeast, Levucell TITAN, which helps stimulate early rumen development. Mr Cameron says: “We have changed the nutrition for weaned heifer calves, moving away from a total mixed ration and switching to haylage with the same range of pellets.

 

“This gives continuity and helps progress the rumen development. We have definitely seen this reflected in more consistent rates of growth.” In fact, he cites growth rates of 0.8kg/day in heifers from birth to calving, and says the former variability in growth rates among youngstock appears to have gone.

 

Mr Cameron says: “We were trying to address variability with the switch away from the TMR and have achieved this.

 

“We do not see those narrow animals with starey coats any more and, as a group, I have never seen calves and youngstock looking so good.” The upshot is that the first group of youngstock on the new regime has come through to bulling and is now being served.

 

He says: “We bull at 13 months and will actually probably find we have too many animals coming through as we have been quite successful at getting them in-calf.” A final gain from the system has been putting the former calf shed back to good use.

 

Mr Cameron says: “We now keep weaned calves in the old shed and they do really well in it. We do not have to stock it so densely and the former design compromises of the shed do not seem to affect weaned calves.

 

“They have had no setbacks before they get to this shed and now they continue to do really well when they move in.”

Changes

 

He is emphatic the improvements seen in the enterprise result from a series of small incremental changes.

 

"We made lots of little changes and it is hard to attribute a particular improvement to a particular change.

 

“We were trying to address the health of calves and their variable growth, and have definitely achieved this. Every small step we have taken has played its part. We are happy with the calves as a result of the overall change.”

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