The aim of the study was to compare and evaluate the welfare of cows kept on two conventional and two organic farms using Animal Needs Index (ANI) system. The system is rapid and easy to use. Its most important advantage is that it provides a final score and thus allows one to rate the evaluated object on a scale reflecting the level of welfare on the respective farm and thus compare farms with different ways of housing. The system showed a very good welfare level on two of four evaluated farms, both with free housing of cows, one organic and one conventional.
