  We report a Dynamical Cluster Approximation (DCA) investigation of the doped
periodic Anderson model (PAM) to explain the universal scaling in the Knight
shift anomaly predicted by the phenomenological two-fluid model and confirmed
in many heavy-fermion compounds. We calculate the quantitative evolution of the
orbital-dependent magnetic susceptibility and reproduce correctly the two-fluid
prediction in a large range of doping and hybridization. Our results confirm
the presence of a temperature/energy scale $T^{\ast}$ for the universal scaling
and show distinctive behavors of the Knight shift anomaly in response to other
"orders" at low temperatures. However, comparison with the temperature
evolution of the calculated resistivity and quasiparticle spectral peak
indicates a different characteristic temperature from $T^*$, in contradiction
with the experimental observation in CeCoIn$_5$ and other compounds. This
reveals a missing piece in the current model calculations in explaining the
two-fluid phenomenology.
