I could have swore Gup Pet did that. I'm going to keep checking because it was either GupPet or BunnyHunter. But I know exactly what you are talking about with the pet info in the tooltip.
Edit:
It's Gup. A thread like your rquest inspired it. It was so long ago I was still going by NickyJean at the time. LOL .. But there's the info.
http://www.wowinterface.com/forums/s...d.php?p=160793