Here's how we recommend handling your mating/joining records in Mobble to keep things simple.
1. Add your bulls or rams into Mobble as their own mob. That way you'll be able to move them around easily keep track of where they've been via the mob or property history.
2. At mating/joining, add a mob movement to record that you've put your bull/ram in with a mob.
3. If you would like to record further details of joining - you can also add a Mob Action for the mob being mated. You can record any extra details such as ram name/number in the notes.
4. You may want to add related tasks/reminders, such as pre-lamb drenching or calving checks.
Related articles: How to Add Offspring to a Paddock or Mob