The intermetallic series RNiAl4 (R = rare earth) exhibit interesting low temperature magnetic behaviour including a variety of (in)commensurate magnetic phases and metamagnetic transitions. The large inverse magnetocaloric effect observed for TbNiAl4 offers potential for low temperature magnetic cooling and it is expected that the strong magnetic anisotropies are driven by the crystal field (CF) interaction. Recent efforts to characterise the CF using inelastic neutron scattering (INS) have been directed at ErNiAl4 as with J=15/2 the orthorhombic environment results in 8 doublets, enough to determine the 9 symmetry-allowed crystal field parameters, although to date this has not produced a unique set of parameters. To complement studies of Er, we propose to perform a detailed study of DyNiAl4 which is also J=15/2 with the aim of solving the crystal field.