  Any possible Lorentz violation in the hadron sector must be tied to Lorentz
violation at the underlying quark level. The relationships between the theories
at these two levels are studied using chiral perturbation theory. Starting from
a two-flavor quark theory that includes dimension-four Lorentz-violation
operators, the effective Lagrangians are derived for both pions and nucleons,
with novel terms appearing in both sectors. Since the Lorentz violation
coefficients for nucleons and pions are all related to a single set of
underlying quark coefficients, it is possible to place approximate bounds on
pion Lorentz violation using only proton and neutron observations. The
resulting bounds on four pion parameters are at the $10^{-23}$ level,
representing improvements of ten orders of magnitude.
