1243 farmers took part in the survey, which was held in partnership with the National Beef Association, British Dairying magazine, the relevant farming unions and the four eradication programmes.
Matt Yarnall from Boehringer said: "Reliance on veterinary input for this decision shows how valuable client discussion and guidance is. And further interrogation of the data shows other areas of BVD control where veterinary input could be extremely valuable.
"Too many producers are still holding onto PI animals in the hope they can be reared successfully and too many are making basic mistakes when it comes to herd biosecurity.
"The survey data revealed that 43% of farmers in Wales have identified a PI, but it is hugely concerning that almost half (42%) of these producers would not cull them immediately; these animals will go on to spread virus throughout the herd."
In Northern Ireland, 26 individual producers said they have kept a PI. "However, 20 had to be put down before reaching adulthood or had to be treated for other health conditions," said Matt. "Even in Scotland, with its well-established scheme, a small percentage of farmers claim they would isolate a PI and try to rear to slaughter and it was exactly the same in England."
Similarly, when it came down to the definition of a closed herd, Boehringer reports that there was significant lack of understanding about what this actually means.
Matt said: "Of the 62% of English producers that state they are closed herds, 2% rear calves away, 19% bring bulls in, 2% buy in heifers or cows and 1% purchase fattening stock.
"Obviously, this means they are not truly a closed herd and supports previous years when 23% and 24% of ‘closed herd’ producers in 2018 and 2017 respectively also brought bulls onto the farm.
"Add to this that 10% of these herds do not currently vaccinate so will not be protected against the BVD virus, and it is clear to see how vulnerable they are."
In Wales, 56% of herds were classified as closed, yet 12% still brought bulls on to the farm. Likewise in Northern Ireland, 60% of farms classified their herds as closed but 20% brought bulls on to the unit. The vast majority of Scottish herds also claimed to be closed, yet there were still inconsistencies around buying policy and biosecurity.
Matt said: "A certain lack of awareness about both the BVD Stamp it Out initiative and Gwaredu BVD schemes (43% English and 27% of Welsh producers respectively claimed to have no knowledge of these programmes) could actually be a positive for vets. It could be the perfect opportunity to engage in proactive conversations with clients, covering issues such as testing, PI removal and biosecurity."
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