Oh, wow, I don't know if I've ever managed to get that many animals of one species alive at a time. They kept eating all the plants and dying out 😅. I'm glad you enjoyed the game!
As for day 47, I noticed some pretty severe performance issues when populations got too large while playing on itch. It was too close to the end of the game jam to fix correctly, so I added a population limit per species of 500 individuals. I intend to upload a fix for that after the jam is over.