The best! Always get two, though--we had one at a time for three rats in a row, and last time got a pair of females, Olivia and Bianca, and the difference in social interaction is amazing. They are much, much happier than the others were, though they do quarrel a bit--my daughter complains that the squeaking and scuffling wakes her up at night. But it's worth it for happy rats. Last Halloween I dressed as the Pied Piper and took them trick-or-treating. They were the hit of the neighborhood!

As for the song, it was only that one line. I suppose I could think about it and get more creative.