Grazing animals can be targeted by thieves and should be treated like any other valuable, with crime prevention measures used where needed:
Regularly check the fields where animals are grazing.
Keep hedges, fences and gates in good repair - ditches form a natural barrier. Field gate hinges should be capped to prevent easy removal.
Use Eartags, horn brands, tattooing or paint marks to make animals more identifiable.
Photographs should be taken of particularly valuable animals.