Sometimes after a LD or getting out a mission, I loose control of my pet. This has been reported many times : the pet is here, following you around but doing nothing and not reporting.
You can then just cast a new pet and charm the lobotomized one to do your bidding.
I consider it's not an exploit since Crats are supposed to have a pet and charm 1-2 more, but still the loosing control part is always annoying.