do you freeze ( on a sheet pan ) the MB's before you vac-bag them ?
to keep their shape ?
Im not that sure about the zoo's , but have you considered making some venison ' ragu ' ?
I use the iPot and ground turkey ,but the idea is the same :
make it in the iPot after a little ' greying ' in a skillet , then use a jar / lbs of meat in the
iPot. it easily holds 2 lbs of meat + two jars of sauce + some bentons bacon
then I freeze into ' bricks '
the vac the frozen bricks right out of the mold , a semi-disposable rectangular food container
which of course I never through out
the Fz bricks hold their shape and are easy to ' brick up ' in the freezer