Not sure what just happened?

So I open the app to find my finch has finished her journey, and my micropet was apparently due to evolve, cool with me. Now, I have no screenshots to prove it unfortunately, but my confusion comes from the fact that I have been adventuring with my WHITE Blizzard and have never actually even OWNED a brown Blizzard. But suddenly I have a baby white Blizzard with no age progress and a brown one that I never even hatched but is now fully evolved? I don’t get it. I didn’t have a referral nor have I ever given any