WALES’ Chief Veterinary Officer has urged farmers in Wales to be alert to signs of Bluetongue as we enter a period where animals are at an increased risk of contracting Bluetongue virus from midges.

Bluetongue does not affect people or food safety. The virus is primarily transmitted by midge bites and affects cattle, goats, sheep and camelids such as llamas, and midges are most active between April and November.

Bluetongue is a notifiable disease, so any suspect cases must be reported to the Animal and Plant Health Agency (APHA).

The impacts on susceptible animals can vary greatly – some show no clinical signs or effects at all, for others it can cause productivity issues such as reduced milk yield or reproductive losses, while in the most severe cases can be fatal for infected animals.

Farmers can help prevent the disease by:

• responsibly source livestock
• practicing good biosecurityon your premises
• remaining vigilant

Keepers considering importing animals or biological products, for example germinal products , from BTV affected countries or out of disease control zones should consult their vet to check if this is permitted, and on the risks of doing so. This should always be done before deciding to import or move animals.

All businesses should have a contingency plan for both responding to disease outbreaks on their premises and if they might be in a disease control zone. Contingency plans should include details of where animals are normally slaughtered to check that abattoir is designated.

Richard Irvine, Wales’ Chief Veterinary Officer, said: “As we enter this period where animals are more at risk from Bluetongue from midges, I would urge all keepers to take action now to protect their herds and flocks to keep disease out, be aware of how to spot Bluetongue and report any suspected cases immediately”.

“Wales has never had a case of Bluetongue – but – with past cases in England and in Europe we are encouraging people to be vigilant and prepared for Bluetongue to strike again.”

Your local Animal and Plant Health Agency (APHA) office should be contacted immediately on 0300 303 8268 if you suspect Bluetongue in your animals. APHA vets will investigate suspected cases.

Further information and resources on the current bluetongue situation are also available on the Ruminant Health and Welfare website.

One of Pembrokeshire’s largest dairy farms, which has a 2,000-strong dairy herd, has submitted a scheme for new calf buildings to “reduce reliance on third-party farms”.

Hugh James of Langdon Mill Farms Ltd has applied for permission for a calf building and weaned calf building, and associated yard areas, at Langdon Mill Farm, near Jeffreyston, Kilgetty.

A supporting statement, through agent Reading Agricultural Consultants, said: “Langdon Mill Farm is a dairy unit extending to approximately 1,215ha, comprising 283ha owned land and 730ha rented, located approximately 1km north of the village of Jeffreyston.

“A further 162ha is used by the business to spread slurry under informal agreements.  The holding currently has a milking herd of approximately 2,000 cows, which are housed indoors for the majority of the year, with dry cows [cows that are not lactating, prior to calving] and heifers grazed outdoors when weather and soil conditions permit.

“There has been significant investment in buildings and infrastructure at the farm over the last decade in respect of cattle accommodation, slurry storage, milking facilities, Anaerobic Digestion (AD) plant and feed storage.  The unit is efficient, achieving yields of more than 10,000 litres/cow/year, with cows being milked three times/day in the 60-point rotary parlour.

“Langdon Mill Farm currently directly employs 21 full-time, and three part-time staff (including the applicants).  Of these, four live on site in the two dwellings opposite the farm, with the remaining staff living in the locality.”

urrently, calves are reared at Langdon Mill Farm for two months before being transported off-site to be reared at a number of third-party farms in the area.

At 22 months the in-calf heifers are brought back to the maternity building to calve, and then are introduced into the milking herd.

The proposed 61.2m long calf building is required to accommodate young-stock, following separation from the cows, to two-months, with the 164.8m weaned calf building to be used for calves from two months to seven months. Following the construction of the new calf accommodation, the existing building would be used for machinery and straw storage.

Currently, weaned calves are transported by tractor and cattle trailer to be reared at a farm in Cresselly, approximately 2.4km from Langdon Mill Farm.

The application says the proposals would “clearly make the enterprise more financially robust by reducing reliance on third party farms,” adding: “Despite the scale of the new buildings, their relationship to the existing dry cow/maternity building and proposed anaerobic digestion plant would ensure that landscape impact associated with the proposed development would not be significant.”

The application will be considered by planners at a later date.

A PEMBROKESHIRE spring-calving dairy farm is introducing a new feeding system for newborn calves in what is to be thought the first trial of its kind in a large-scale herd.

Will and Alex Prichard are feeding enriched pasteurised transition milk to calves in their first 10 days of life rather than abruptly transitioning them to whole milk or milk powder.

Research has shown that feeding transition milk to young calves vastly improves their digestive system’s ability to digest milk, with those benefits sustained to keep them healthy and thriving as they grow.

The Prichard’s, who produces milk from 500 spring calvers, were keen to trial this feeding system in their own herd at Escalwen, Letterston, in the hope of improving calf health and wellbeing.

They are doing this with support from the Farming Connect Try Out Fund, an initiative that funds individuals and groups of farmers and growers to experiment with ideas and bring them to life.

Although the health benefits from enriched pasteurised transition milk have previously been demonstrated in all-year round calving herds in the USA and Canada, it is believed to be the first time it has been trialled in a large-scale block calving herd.

Getting the correct nutrition is crucial in the early stages of a calf’s life.

Even after a few hours the animal loses its ability to absorb antibodies – there is a dramatic reduction within 10 hours of birth and, by 20 hours, that capacity has all but gone.

To establish the effectiveness of the transition milk product, calves born at Escalwen this spring are being blood tested for antibody levels.

The transition milk is also being tested for its immunoglobulin (IgG) status before and after it has been pasteurised.

If it needs enriching this is being done to raise the BRIX value to a minimum of 12.5%. It is then fed to calves during their first 10 days of life.

An optical refractometer is being used to measure milk BRIX as it gives an instant result but by the end of the study all batches of transition milk will have been tested for IgG using Radial Immunodiffusion Assay at the University of Edinburgh.

Vet Dr Ryan Davies, director of Veterinary Technical Consulting Ltd, who is providing expert input into the project, says this will enable the accuracy of milk BRIX to be determined to quantify IgG status.

“We will then assess this against the health status of the calves,’’ he says.

Mortality from neonatal calf diseases such as diarrhoea, pneumonia and navel and joint ill is being monitored and antibiotic use too, as well as daily liveweight gains – at birth, at 30-35 days and at weaning.

The Try Out project hopes to understand more about how dairy farmers with large block calving herds can consistently produce animals that are healthy, productive and have a good quality of life through optimising calf health with preventative healthcare.

More productive animals mean less carbon emissions, higher standards of animal welfare and a reduction in antibiotic usage.

Not only do Will and Alex hope to reap the benefits in their own system but that other farmers will too when the findings are shared with the industry at the end of the project.

“Having the ability to acquire extra resources at the busiest time of our year has allowed us to monitor the results of our actions in a more scientific fashion,’’ says Will.

“Funding large scale testing is telling us so much about what is happening in our own herd environment and most importantly what behaviours and protocols are driving tangible improvements in herd health and antibiotic reduction.”

They had already made big gains in improving calf health before this project got underway.

The five-year average for morbidity in their pre-weaned calves from 2018-2022 was 45%, in line with the national average of 47% – in 2023 it was reduced to 17%.

Use of the Highest Priority Critically Important Antibiotics was reduced from 1.98mg/ population corrected unit (PCU) in 2022 to zero the following year.