Disclosed is a method for the treatment or prevention of a parasitic infection or infestation in a non-human animal comprising administering orally to the animal an effective amount of a multiple active veterinary formulation comprising: at least one first active at least one second active which has incompatible formulation requirements to the first active(s) a liquid carrier a solvent and a sorbing medium, wherein the first active or each of the first actives is compatible with and carried in the liquid carrier, and the second active or each of the second actives is compatible with the solvent, and the sorbing medium contains both (a) the second active(s) and (b) the solvent, to form a chemically stable suspension in the liquid carrier.
