After completing a paddock treatment with a withholding period, you will notice the treated paddock will turned bright red for the duration of the withholding period. 

The withholding total number of remaining days and finishing date can be viewed when you click into the paddock and navigate to the Details tab. A red 'W' circle next to the paddock name indicates the paddock is in withholding.

If you attempt to move livestock into a paddock during a withholding period, the livestock movement details will notify the mover that the paddock is in a withholding period.  To move the animals you must be confirm by selecting the Continue button. 

It's that simple! All you need to do now is apply a paddock treatment with a withholding period.