[Housing and health of farm animals].

Data on the relationship between housing systems and health in farm animals are relatively scarce. In dairy cattle and poultry, for which special housing systems are dominant in the Netherlands, no important new figures are available. In veal calves, the group housing system is being investigated. Preliminary results indicate that there are many problems in the first 6 to 8 weeks. More research has been done on pigs. It is now clear that the floor system is important not only with respect to leg and claw problems; the morbidity and mortality of pigs in pens with (partly) slatted floors is higher than in the Danish (straw) systems.