If you wish to track a Mob individually, you can use 'Individual Tracking' on the creation of the Mob by adding a Visual Tag Number. This will stop the Mob from merging with other Mobs.
Adding a Custom Breed
If you wish to create a custom breed you can use the '+ Add New Breed' button in the 'Select Breed' section.
Adding Bulls & Rams Individually
If you wish to add Bulls or Rams individually you can do so via 'Individual Tracking' on the creation of the Bull or Ram. This will stop the Bull & Ram from merging with other Mobs.