The optimum situation is where lambs are tagged at birth, weight recorded and correlated to their dam/sire, allowing selection decisions to be based on the animal’s own performance and its genetic background.
This will obviously not be a runner on every farm, but steps can still be taken that will lead to better selection decisions. At a minimum, identifying lambs from the best-performing ewes and sires that you want to breed from will help. This can take the form of applying a management tag or ear notching. Some people prefer to apply a good spray or marking fluid branding and follow up with a more permanent identification when animals are older.
The same can be said of identifying problem ewes. A spray mark is often used but not followed up on at a later date. As such, applying management tags, recording tag numbers or ear notching are a more reliable record to follow.
A tip to correlate ewes with their lambs and reduce labour at lambing is to spray mark numbers on ewes in advance of lambing. In this case, only the lamb then needs to be marked at lambing. Other tips where twin and single lambs are being run together post lambing is to use a different spray colour for twin and single lambs. In this way you will know quickly when checking animals if a ewe with one lamb is missing another lamb.