Your friend that recieved 50% more back may have had pork and/or beef added to his order. Many processors do add 30%-75% beef and/or pork because most people do not want to "taste" the venison. It may be due to some family members not liking the taste of venison or it just may be the processor always adds it to make a little extra $$. Here at Smoke n' Antlers we do not added any beef or pork to someones order which includes beef or pork fat. We use bison fatto add moisture to tovenison ground meat or sausage.