Nothing worse tasting than a rutted up mule deer. There is no way to disguise that nastyness.I killed a rutted up muledeer one time that the dog wouldn't eat. I made it into sausage and salami and it was almost palatable and then gave it all away to unspecting distant freinds. Haha It was well cared for just horrible eating, and there was over 100lbs of burger off him. It would drive you out of the house just defrosting it in the microwave.
I put 5-7% suet in my burger. Just enough for me and the family. Moose is almost flavorless without.