  It is shown that including form factors for the quark-pseudoscalar meson
couplings of the Georgi-Manohar chiral quark model allows one to obtain the
leading off-shell dependence of $\pi^{o}- \eta$ mixing (as predicted by chiral
perturbation theory) from the effect of quark loops on the meson propagators.
Implications for $\rho^{o} - \omega$ mixing and for the effects on meson mixing
contributions to few body charge symmetry breaking observables are also
discussed.
