The basic concept concerning the provision of animals' needs and the a
voidance of damage are described. This originates from pure natural sc
ience. In the application of the concept consideration must be given t
o the >>type<< developed by individuals of a species or breed living i
n a semi-natural environment. The definition and application of the te
rm >>type<< is described in detail. Housed animals which are not like
such >>types<< are living under poor welfare conditions.