Gah! I tried for two hours to get a second Chewnicorn into my garden, feeding them over 60 gems (that’s 60×360=21600 coins worth), when I could have just got Gretchem to catch me another in minutes for around 10000 coins. Anyway. Finally, managed it, and romanced them too.
While all that gem eating was going on, I set about breeding Flutterscotches. Got the Master Breeder award for Black, Yellow and Red ones, and made a start on getting some Blues. It seems that when you mate two Flutterscotches, you get white ones from the egg, regardless of the colour of its parents, which is a pain as you then have to evolve them yourself. Oh well.