At least one abattoir in NI has increased the vet fee deducted from farmers for animals at slaughter, with the prospect that others will follow, sources in the trade have confirmed.It is understood that ABP Linden is among the first to increase the charge, with the deduction rising nearly £2/head. An extra 50p is also being removed for insurance, with factories having previously raised concerns at the high number of TB-infected cattle being presented at abattoirs and subsequently skipped by meat inspectors as not fit for human consumption.