Deer, Heron and Crow

On Maffi's birthday Kim and Jim bought over the remainders of a deer so I could do my business with it. I put it in the boot of the car in order to take it to the ancestral seat and deal with it there. Unfortunately due to my concussion etc I didn’t feel up to doing anything with it, so it has remained in the car ever since. Maffi, bless him, hasn’t complained at all. He makes the odd murmuring when we first get into the car about how I need to do something about the deer, and I can only agree, and then it isn’t mentioned again.
It isn’t only the deer I need to do something about; the crows head, and the heron are in need of attention, the latter is still in my gas locker.
Anyway, the ultimate solution is chicken wire. What I need to do is make a chicken wire cage/box, put the remains in it and then immerse it in the water until it is nice and clean. The question is whether it will work or just stop the rotting process.