  We study the far-off-equilibrium dynamics of a Bjorken expanding
non-conformal system within kinetic theory and hydrodynamics. We show that, in
contrast to the conformal case, neither shear nor bulk viscous pressure relax
quickly to a non-equilibrium attractor. In kinetic theory an early-time,
far-from-equilibrium attractor exists for the scaled longitudinal pressure,
driven by the rapid longitudinal expansion of the medium. Second-order
dissipative hydrodynamics fails to accurately describe this attractor, but a
modified anisotropic hydrodynamic formulation reproduces it and provides
excellent agreement with kinetic theory.
