doesn't matter when you kill your pet. be it version 2, version 6, lvl 1 or lvl 199.
it all still works the same. so you're fine.
and what pet bonus are you talking about? every pet get a specific amount of stat points when thhey rb. as fas as i know as other has mentioned it makes no diffrent if you rb them at 100 or 180 it'll still be the same O.o
Picklessssssssssssssssssssss!~
See more on Know Your Meme
[Guide] Level Planner for Player and Pet Training - http://wlodb.com/topics/13527
[Guide] Ultimate Pet Page - http://wlodb.com/topics/15272