I would pick a date you want to start pairing. I always chose Friday. So for my example, I'm going to refer to Friday. Place male #1 with female#1 for three days (or until he unlocks if he locks on day 1 or 2) on Friday. Then remove male #1. Feed male #1, Female #1, and Female #2 on Monday. Wait until the following Friday then put male #1 with Female #2. Remove male#1 after 3 days or after he unlocks. Feed male #1, Female #1, and female #2 on Monday. On Friday, place Male #1 with Female #1, so on and so forth. When you're ready to put male #2 in, just add him into the same schedule. If you want him to breed both females, just trade out males each week. If you start to see them slowing down, you can always pair them every other week or once a month.