I have a 6" boning knife that I have used to clean hundreds of critters from squirrels and rabbits to ducks, flatheads and deer. The blade is somewhat flexible. I recently worked with knifemaker Tommy Gann who makes a set of deer knives. One is a skinner and the other is a 6-7" boning knife. I do 100% of my butchering and I consitently use my 6" boning knife or a small fillet knife for deboning, cutting and cleaning small pieces for grinding.