A broad-spectrum horse worming paste for the treatment and control of susceptible strains of all common worms of horses including Small Strongyles (Redworms) (cyathostomins) including Benzimidazole (BZ) resistant strains, Large Strongyles (Bloodworms) (Strongylus spp. and Triodontophorus spp.), Pinworms (Seatworm) (Oxyuris equi), Large Roundworms (Ascarids) (Parascaris equorum) including adult stages of ivermectin, moxidectin and abamectin resistant strains of Parascaris equorum. Also aids in the control of Tapeworms (Anoplocephala perfoliata).