#$%^&*AU2013205966A120140828.pdf#####Abstract Disclosed is a bolus comprising: a bolus body comprising a matrix material and one or more biologically beneficial substances contained in and/or on the matrix wherein the exterior surface of the bolus body is shaped so as to have a least one recessed portion and at least part of the recessed portion of the bolus body is coated with a material which retards or inhibits release of the beneficial substance(s) from the matrix.Figure 1: 400 350 300 250 200 150 1100 50 0 26 61 93 119 159 181 208 236 Control Bolus x 1 .Bolus x 2
