I've tried the zapper for a pet a few times now (about 6 or 7) and every single time it tried to zap something in my inventory. After the 2nd time I emptied the inv every time beforehand so nothing bad happened, but it's getting annoying when I was kinda hoping it might work on the pet instead!! Is it having problems? Am I just incredibly unlucky? Am I doing something wrong? I thought that the inv zap was supposed to be a rare thing? Is it even worth zapping?

I adopted the pet and it's in the resort, is that affecting it?

I haven't done any zapping for years really, and had thought there was 2 zappers but obviously the old one (that seemed to only work on pets and minions) is gone.

You are just unlucky. The zapper is entirely random.

1. Always remove everything from your inventory that isn't locked.
2. The resort does not affect zapping
3. Yes one zapper is gone, but the one left is the one that also can modify your minion because we even got special zapper minions.