‘Although there are no specific trace element problems known on any of the land used, ensuring all ewes have adequate levels of key trace elements at all times throughout the breeding cycle is a critical part of the system. From just available grazing and by-product feeds supported by a cobalt, iodine and selenium trace element bolus last year we had less barren ewes, the sheep were fitter despite being on very poor grazing and I reckon we saw a 15 – 20% improvement in lambing percentage overall. For a pound a bolus I reckon that’s pretty good going, particularly when you can spend £1000 very easily on bagged minerals and not know which, if any, animals are getting enough’