Porcupines to grubs

I've put two roadkill porcupines in the grub generator now.There are often porcupines dead on the road here.  This little rodent is not loved in Nova Scotia.I've been skeptically eyeballing roadkill with grub generation in mind for a while now, but on the chance occasion that I actually had a shovel and a bucket in the truck, I acted on the impulse.However, I was not super keen on being sighted in the act of collecting a mangled corpse off the asphalt, sooo...Pull over, feigning a cell phone call.  When the coast is clear of vehicles, dash into the road with a shovel.  Dash back with bloody cargo and slam it into the truck.  Leap back into driver's seat (cell phone call very important).  Rejoin traffic.So far, so good on the sneaky roadkill snatching.  I have not been seen.The porc-épic's in the bucket are excellent for making grubs.  Day after day, the grubs keep climbing out, far more than the dead chicken and small rabbits.  They must be quite dense.  What's very interesting is that as the grubs ooze out of the crack in the upper bucket, they push quills out with them!  How?  What is happening?  A whole handful of loose quills comes poking and falling out with the grubs (!?).Grub generation: flies lay their eggs in carrion.  The eggs hatch, and at a certain stage of growth and motility, the grubs feel the biological urge to bury themselves in the earth to enter their next stage of growth.  So they climb out of the carrion bucket, in order to drop to the ground.  Alas, they are caught and trapped by the second bucket, and fed to the chickens.