Ported from SpliceHack, and generalized to all shapeshifters (Splice
only implemented it for chameleons). It's very aggravating when your
powerful but hungry pet chows down on a shapeshifter before you can stop
them and then turns into something much more useless, so this aims to
prevent that.
The extreme circumstances under which a pet will eat a shapeshifter are:
1. The pet is starving, and prefers polymorph to starvation
2. The pet's tameness is 1
The reasoning behind the second condition is that if you mistreat your
pet almost to the point of untaming it, it might want to take a chance
on turning into something that might get some more respect from you.
Practically, whenever this happens, this will result in the player now
owning a newly polymorphed and *still* nearly feral pet.
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