By any chance, do rabbit snails have MTS-sized babies? Last time I was in there, I asked for a bunch of MTsnails to turn over a sandbed, and a few of the snails are a rich reddish-brown and slightly different shaped. I was just wondering if I got a few tiny rabbits in there somehow.
I saw a few of those adult rabbits... They're pretty! For anyone wondering, I'd say they're probably a good addition to an aquarium of almost any kind that doesn't contain snail-eaters.