Well someone taught those fluff tails a lesson! Actually not really because it's only a matter of time before the next smart squirrel finds it's way into that warm "giant hollow tree". You and your Unc definently need to seal off wherever they got in from because you will have more and I'm sure there already are mice comming in through that hole. Mice get in through everything but if it's big enough for a squirrel then you need to block that for sure.
Hey hell of a job though by him. How did he get them? If anyone ever need's critter help let me know, live or lethal, I'm here to lend advice. Personally I'm not "allowed" to take a stand on the human vs inhumane debate though because where I'm from if you don't want something released back on to your property then I lawfully have to euthanize it.
In my eyes it's better to set lethal traps in that situation because animals beat themselves up in the live traps.
I've heard of mice and chipmunks rummaging through peoples MJ, and other types of crops. They are after potential seed's, I'd guarentee it.
Best,
Buddy the Trapper (The Wildlife Trapper... not the other kind of trapper
)