That second property seems to be a great business opportunity. Unless its carcass disappears when unattended, an enterprising adventurer can just catch it, butcher it, and then expect another one to show up.
And then the butchered meat would then be cooked as desired. Peking Goose, anyone?
That’s too bad.
It’d also be hard for the DM to handle a player character who suddenly goes off to retire, and end up peddling mystery bird roast.
If I were DM though, I’d probably ‘promote’ that guy to ‘recurring NPC’. I’d have that NPC randomly show up whenever the party decides to long rest, offering a selection of mystery meat for ridiculously low prices.
I could also have that guy sell potions and stuff at a ridiculously high markup, lol!