Veterinary compositions for the treatment and/or prevention of protozoan diseases and methods of preparation thereof

A method of manufacturing a veterinary composition to treat and/or prevent of protozoan diseases in animals, the method comprising:

• a) mixing an essential oil and a plurality of organic acids at a ratio of 80:1 to 1:80 by weight, the essential oil including aniseed oil, cinnamon oil, tarragon oil, clove oil, dill oil, Balsam of Peru, Ballota oil, star anise oil, or calamus oil and the plurality of organic acids including at least four acids selected from the group consisting of valerian, isovalerian, lactic, butyric, acetic, propionic, formic, benzoic, pelargonic, salicylic, malonic, citric, phthalic, tartaric, oxalic, malic, shikimic, fumaric, mandelic, cinnamic acids or derivatives thereof;
• b) adding a catalyst and a metal including molybdenum, cobalt, nickel, chromium, zinc, bismuth, copper, manganese, selenium, iron, or salts or oxides thereof to form a mixture;
• c) heating the mixture to form a reaction product;
• d) allowing the reaction product to cool;
• and
• e) filtering the reaction product.