  In the metallic pyrochlore Nd$_2$Mo$_2$O$_7$, the conducting Molybdenum
sublattice adopts canted, yet nearly collinear ferromagnetic order with nonzero
scalar spin chirality. The chemical potential may be controlled by replacing
Nd$^{3+}$ with Ca$^{2+}$, while introducing only minimal additional disorder to
the conducting states. Here, we demonstrate the stability of the canted
ferromagnetic state, including the tilting angle of Molybdenum spins, in
(Nd$_{1-x}$Ca$_{x}$)$_2$Mo$_2$O$_7$ (NCMO) with $x\le 0.15$ using magnetic
susceptibility measurements. Mo-Mo and Mo-Nd magnetic couplings both change
sign above $x=0.22$, where the canted ferromagnetic state gives way to a
spin-glass metallic region. Contributions to the Curie-Weiss law from two
magnetic sublattices are separated systematically.
