Let's use this as an example. There are a set of horses (1 male and 4 females) within the 10m of the object's detecting range. When the females give birth, they drop objects called "Hellsent Horse Bundle" (of course not an actual breedable, just an example), but the UUIDs are different and random. Each female drops 1 of these bundles on average of 8 days, with about 2 days in between each female (female #1 drops, 2 days later will be female #2, etc.). The message is to be sent out once each time one of the females gives birth, even when I'm offline.