oh just 1 more thing !! i as well as keeping racing pigeon keep horses and would in my opinion say eqvalan or how ever u spell it ! is not really that good any way . if u go through horse wormers they all do diff things and it depends what time of yeah as to what u really need to treat for .. oh and by the way most wormers treat up to around a 600 or 700kg horse f--k me that is a lot of pigeons !