Further experimentation, this time involving variable ingredients (Butcher's Surprise)
Q10 Maple Blocks, Q37 Smoker
Results Compared to Base Sausage:
Beaver Dog - Increased Constitution+2 dramatically. Increased Will and Charisma FEPs. 9.68 FEPs/Hunger @ Q30.9
Piglet Wursts - Replaced Constitution with Dexterity FEPs. Increased Strength FEPs. 5.28 FEPs/Hunger @ Q32.6
Running Rabbit - Increased Agility and Intelligence FEPs. 6.91 FEPs/Hunger @ Q30.2
Lamb Sausages - Replaced Strength with Constitution FEPs. Increased Perception+1 FEPs dramatically. 5.86 FEPs/Hunger @ Q30.2
Fox Wurst - Added Charisma+1 FEPs. Increased Perception and Intelligence FEPs. 4.04 FEPs/Hunger @ Q32.2
Fox Fuet - Replaced Constitution with Will FEPs. Increased Strength+1 FEPs dramatically. 5.77 FEPs/Hunger @ Q30.2
Lynxalami - Replaced Constitution with Strength FEPs. Added Charisma FEPs. 10.35 FEPs/Hunger @ Q30.9
Smoked Butcher's Surprise Results Compared to Un-Smoked:
Boar - Replaced Strength with Constitution+1 FEPs.
Venison - Removed Agility FEPs. Dramatically increased Perception+1 FEPs.
Wild Beef - Replaced Strength with Constitution+1 FEPs.
Bat - Added Intelligence+1 FEPs.
Swan - Replaced Perception+2 with Intelligence+1 FEPs.
Wild Mutton - Appears to have redistributed some Dexterity+1 FEPs into Perception+1. Increased Charisma+1 FEPs.
Reindeer Venison - Added Dexterity+2 FEPs. Appears to have redistributed some Perception+1 FEPs into Dexterity+1.
Lynx - Replaced Intelligence with Strength+1 FEPs.
Summary: The use of variable ingredients changes the outcome of the smoking, depending on the meat used (at least in Butcher's Surprises).