I am so sorry for your losses,
I live near an area that people would think that they could re-home their predators, as well as dump their unwanted house pets.
How absolutely maddening if those two working in tandem had been re-homed to your area. I don't think they naturally know how to break into pens and gain access
or to even know that pens = food. But, I could be wrong, maybe the Raccoons in the wild are raised with mom making wooden cages to demonstrate the ability.
When you first told us that Dragon was killed, I did a search on the internet and there was a newspaper article about a MN mans caged peacock getting killed by a predator. Maybe
you could get an article in the local paper about Dragon and Pip and the trouble your having, or at least let the local authorities know about it, and maybe they could look into to see
if your local "predator removal" people are re-homing them to your area.