I have seen it over and over, Breed ID 4 hits/heals best with 341-374 power, and from what I have gathered Breed ID 5 is the fastest with 358-390 speed, and Breed ID 6 has most health with 1806-1969 hp.
Am I wrong in assuming this is how it is supposed to be? If you want a tanking pet, search through pets with breed ID 6, if you want a heavy hitter, search for pets with breed ID 4, if you want a speedy pet (not the turtle) then you search for breed ID 5.
Since this seems to be the case, perhaps searching through the pet database ( http://www.warcraftpets.com/wow-pets/filter/ ) should have an option to filter only pets with specific breed IDs?
I know this might belong in another forum section, but it is relevant info for pet collectors aswell, when looking for the best versions of a pet Feel free to move it to whatever section you see fit though, I wont mind.