The video below looks at recording a dry cow treatment for a group of cows. You can also use this method to treat any group of cows for any treatment. Eg: Your whole herd with B12 or Selenium.
1. Go to Enter Data > Treatments
2. Click on the option that says "Click here to enter the same data for many cows"
3. Choose your treatment Date and whether you gave it in the morning or afternoon
4. Select the Treatment Given, "Cepravin", and update the Dosage and Quarters treated
5. Make sure Apply Withholds is selected and unselect Retreatment Reminder
6. Choose the Group of cows to treat and click on the box next to "Select All/None" to Select all the cows
7. Click Create Events
(You will need to follow the process through, as prompted by the system, to Save your dry-offs)