Eye of Zomm should not work while you have a pet
 

http://www.tski.co.jp/baldio/patch/19990607.html

Bump.

There is something wrong here, because I used to cast an eye and tap it as a Necromancer in Velious... pretty sure WHILE I had a pet. So at some point in Velious, this had been reversed. Velious was released in December of 2000 I believe. It was in Velious that I got Holgresh Elder Beads and was then able to cast an eye.

Perhaps this was reversed in a January 2002 patch when eyes became more like familiars and less like pets.

http://www.tski.co.jp/baldio/patch/20020213.html

"Eye of Zomm and Eye of Tallon are now non-KoS in a fashion similar to familiars."

This is already Luclin time frame though.

Then again, in a April 2002 patch:

"A character may now have a horse, a pet and an Eye of Zomm at the same time."

Of course this could have been referring to the addition of a horse to a possibly already allowable pet with Eye of Zomm.

I'm almost positive Lazortag is correct. mwatt is correct in that it changed in 2002.

2003
2002
from http://everquest.allakhazam.com/db/quest.html?quest=704

2001
from http://everquest.allakhazam.com/db/item.html?item=6653

Fixed, pending update.