Reviewing individual animal data on a routine basis would be time-consuming, but could be managed with a custom diagnostic list in the herd software program. In practice, agreement regarding the solution should be unanimous.
Use a DIM list, move the cows that are OK to breed, and move cows with the highest DIM first. If 50 cows need to be moved out per week, but 75 cows have been checked ready to move, move the right cows! It is not unusual that the first 50 cows in headlocks are moved due to convenience. A cow that fails to lock (not uncommon for heifers) may spend a couple of extra weeks in the fresh pen.
Another effective solution is to use fencing to create a flexible-sized fresh pen. A 150-cow pen can be split into a 50-, 100- or 150-cow pen. Reducing the size of the fresh pen when needed “forces” cows out of the fresh pens. Yes, it complicates the feeding program with potential frequent re-programming of the feeding software.
Take a look and see if this is an opportunity for your clients.