Hey there,

i'll try to explain what I mean...

Is there an addon that checks which pets I own (i.e. westfall chicken etc.) and shows me which ones I still need and what i have to do to get it?

Just like factionizer does for reputation

Doesn't an addon like this exist?

Something that helps getting the 75 pet achievement and more

there are several different pet collector addons, personally i track my collection through the wow minipet website, (http://www.warcraftpets.com/) but i also snagged an addon they featured for the random pet thing. so much fun!! (i got the collector, as i know exactly where my missing pets are and only wanted the random pet summon)

anyways go check it out, there should be something there you could use.

http://www.warcraftpets.com/downloads/pet_addons.asp