  In this paper, we study all transport coefficients of second-order
dissipative fluid dynamics derived by V. E. Ambrus et al. [Phys. Rev. D 106,
076005 (2022)] from the relativistic Boltzmann equation in the relaxation-time
approximation for the collision integral. These transport coefficients are
computed for a classical ideal gas of massive particles, with and without
taking into account the conservation of intrinsic quantum numbers. Through
rigorous comparison between kinetic theory, second-order dissipative fluid
dynamics, and leading-order anisotropic fluid dynamics for a (0+1)--dimensional
boost-invariant flow scenario, we show that both fluid-dynamical theories
describe the early far-from-equilibrium stage of the expansion reasonably well.
