  The Rarita-Schwinger theory of free massive spin-3/2 field obeys the physical
degrees of freedom counting, and one can distinguish ``consistent'' couplings
which maintain this property and ``inconsistent'' couplings which destroy it.
We show how one can obtain consistent couplings from inconsistent ones by a
redefinition of the spin-3/2 field. The field redefinition gives rise to
additional ``contact terms'' which, via the equivalence theorem, can be
associated with the contribution of the extra lower-spin degrees of freedom
involved by the inconsistent coupling.

High Energy Physics - Phenomenology;High Energy Physics - Theory;Nuclear Theory