The uniform dynamics of nearly isotropic cubic ferromagnet CdCr₂Se₄ in the ordered phase is investigated. It is found that the longitudinal susceptibility behaves as χ∝ω^-ρ with ρ≈0.28. The low-frequency crossover to ω^-ρ dependence is induced by the internal magnetic field H_i We attribute the observed anomalous behavior to the influence of dipolar forces and propose a description of χ(ω, H_i) in terms of phenomenological scaling.