50% chance of an empty litter (1-50 is a successful breeding)
-----
-----
-----
-----
-----
No chance of empty litter if bred to Recognized+ (50% fail with a citizen)
------
------
------
------
------
------
------
------
------
------
No chance of empty litter if bred to Recognized+ (25% fail with a citizen: 1-75 is a successful breeding)
------
------
------
------
------
------
------
------
------
------
No chance of empty litter if bred to recognized+ (10% fail with a citizen: 1-90 is a successful breeding)
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
Infinite breeding slots No chance of empty litter
------
------
------