On Prepare carefully, I tend to take one male/one female of several species.

I found that anytime I reroll the map, it randomly changes the genders of the animals that I have brought along with me (Not talking about wild animals on the map). This unfortunately makes the mod unusable for me, as I can no longer breed the nreeding pairs I have brought along, as I suddenly will have two males, two females, etc instead of the preselected breeding pairs.

It took me a long time to figure out which mod was doing this as I had assumed it was an animal-related mod. But after checking I realized it only happens when I reroll the map with this mod.

To check, use Prepare carefully to bring one male one female of a number of animal types (the more you bring, the better odds the breeding sets get messed up) and check their genders before and again after a map reroll...

Otherwise, I really enjoy this mod, and am sad I need to disable it for now :(