I'm not sure if this was made on purpose but it's incredibly annoying anyway. Once pet gained all perks after level 100 you can't use a Reset Star anymore because you can't feed it at all. I just spent 2kE to see that it doesn't simply work, if this was meant to be like that there should be a note somewhere at least...
EDIT:// No idea how I missed same topic that's on 1st page, graveyard...
EDIT: oops, late post. ;C