The WelZdrBio (welfare-health-biosecurity) software evaluates the level of welfare, health and biosecurity of dairy cows, pigs, laying hens and broilers. It is based on a requirement to raise welfare levels, maintain good animal health and farm biosecurity against pathogens penetration and its spreading on the farm premises. The evaluation is based on an analysis of the individual basic and particular critical conrol points that are in relation to the individual areas of welfare, health and biosecurity, that is divided into two parts, external and internal.