Hello!
Just a small suggestion here, as it is at the moment, you can't apply Vuka Vuka to lionesses under the age of 2. This seems a little weird as just about every other applicator (base, mark, eye, mane, personality, etc) doesn't have anything like this constraint, and I guess I'm just not too sure why Vuka Vuka specifically has this :P
It's a bit difficult since I use it often to keep my pride at breed-able fertility since I don't have heaps of time on here, and it's difficult to revisit lionesses to try to raise their fertility to something manageable.
This would be a very easy fix, and I don't really see why it shouldn't be added!