Abstract: The invention proposes a foot bath for applying a treatment liquid to feet and which facilitates the use of a smaller quality of treatment liquid. The foot bath comprises a deformable liquid collection surface (22) bounded by a rim to retain the liquid therewithin. More particularly the deformable liquid collection surface comprises a sheet of flexible impervious material disposed over a resilient supporting layer (20). The action for an animal walking on the surface (22) causes a well to be formed in the liquid collection surface into which the treatment liquid flows. The depth of the supporting layer determines the depth of the well.