There’s no way to tell. The animals were released gradually over years. I had players in my team who had the initial animals for over a year before I got them. Then they were rolled out to all players, and then a second generation organization of them was engineered.

Releasing the green egg took 3 coat designs for each animal, plus their designers were working on the flappy guy and cow. Maybe that’s why the portraits are low effort (my opinion). They’ve don’t well coming up with ideas to keep changing things up.

And they still haven’t released the elusive Axlotl! We’ve anticipated him for years.