Where there is a significant spread in lambing (ewes followed by hoggets or ewe lambs, for example), animals should be split into treatment groups to achieve the optimum administration timeframe. If animals have not received a previous full treatment course consisting of two treatments given four to six weeks apart, a full vaccination course will be required.

Two treatments will also be required if it is greater than 12 months since animals have received their last booster vaccine, a factor that may occur more this spring with reports of some farmers opting for a later lambing date.

The vaccine is live and therefore needs to be handled carefully and according to manufacturers’ guidelines with storage and usage once opened the main factors to take into account.

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