Minimal response to B12
In a split trial in spring with weaner hinds grazed together on red clover for 67 days, half were given a 3ml “Smartshot” injection and the others were untreated. There was only a small (6g/day) growth advantage in the treated animals. The carcass weight advantage, even at an $11 schedule, was barely enough to pay the $3.40 cost for the shot.
However a much cheaper, shorter-acting alternative, “Proloject”, costs just 7 cents a shot and is being given three times (weaning, pre-winter and spring). The Clarkes intend to persist with this treatment to see if there will be a more cost-effective advantage. (It may be more telling to try the treatment on less palatable feed to see if the appetite stimulant effect is greater.)