Second-order pseudo-Hermitian spin-$1\mathrm{/}2$ bosons

The canonical quantization of a field theory for spin-$1\mathrm{/}2$ massive bosons that satisfy the Klein-Gordon equation is presented. The breakdown of the usual spin-statistics connection is due to the redefinition of the dual field, rendering the theory pseudo-Hermitian. The normal-ordered Hamiltonian is bounded from below with real eigenvalues, and the theory is consistent with microcausality and invariant under parity, charge conjugation and time reversal.