Biosecurity practices in Belgian veal calf farming: Level of implementation, attitudes, strengths, weaknesses and constraints.

•Biosecurity awareness among veal farmers was very low.•On average, veal farms were filled in 11.4 days.•On average, 124 calves originated from 100 farms of origin.•No difference in biosecurity level could be found between different veal companies.•Fundamental changes are needed to improve biosecurity regarding introduction of animals.