Here are 2 of the special babies. Since I got 2 of the Hot Salamader kitties, I'm guessing that one is the 'normal' (or I'm extra lucky). That would leave the Meadow Grass to be a rare or ultra rare.
ETA: Based on group talk, it looks like the Meadow Grass is the 'normal'. And with ReecePie's post below, it looks like we now have our Ultra Rare of 'Rainbow Romp'.