What is the best pet? (Highest ranking pet on the site) does anyone know?

depends entirely on what you are ranking the pet by.

At the bottom of each and every page of Subeta is a teeny weenie tiny link "about subeta'. Go have a look.

Are you asking about colors? Species? Stats? A little clarification will help to answer your questions

the highest ranking user pet is boarder, and he's also highest ranking for speed and intel. the other six ratings (strength, level, def, health, foods eaten, books read) are all different pets.

the highest ranking pet species is kumos.