They will not work in traders ( you must of use CM to get them)
in the Traders POI you will get nulref if try to put them there.
That's why we use the quest to get them, if you try to put the guard down in trader it wont work
I think the word petTEST is a clue not to use it
some times when working on new ideas some old code gets left in
Had a look and don't see it is connected to any quest line
just remove it or comment it out