  We consider the role of matter in the non-projectable version of
Horava-Liftshitz gravity at both a classical and a quantum level. At the
classical level, we construct general forms of matter Lagrangians consistent
with the reduced symmetry group and demonstrate that they must be reduced to
their relativistic form if they are to avoid sourcing the gravitational
Stuckelberg field. At the quantum level we consider one loop corrections to the
propagator for a relativistic scalar minimally coupled to gravity at tree
level. We find large corrections to the light cone at low energies arising from
the strength of the coupling of the scalar graviton to matter. We also find
evidence that higher order time derivatives may be generated, which is worrying
if this is to be taken seriously as a UV complete theory.
