Buck 110/112
Schrade Old Timer 6OT/7OT.
PUMA (larger) Lockbacks. (those that are Buck 110/112 size)
One and two blade slipjoint folding hunter.
moose pattern.
Trapper pattern (full size).
Muskrat pattern.
OKAPI.
Otter Mercat.
"Toothpick" pattern.
The multi blade German "Sportsman" knives.
Peeling and butchering critters large and small, and fowl is what they were designed and marketed for.
85/91/93mm and larger SAK's.
SVORD Peasant.
The Opinel and other "penny knives" have also been used for generations to peel, field dress and butcher game critters and fowl as well as "domesticated" foul, and to clean and/or fillet fish.
Several multitools also have a blade set suitable for processing game. The Leatherman Charge, and others for example, has a serrated blade with a gut hook, and the "wood saw" is quite effective cutting bone. (ditto the SAK "wood saw".)
As long as you rinse/wash the blood off when finished you should be fine.
As far as "sterile" is concerned, it ain't happenin' no matter what you use - folder or non-folding.
"Sterile" is a myth.
Anything exposed to the atmosphere is instantly contaminated by among other things, germs and viruses, terrestrial and extraterrestrial "dust", mold and other spores, plant pollen, tiny bug/skeeter/gnat/fruitfly

, industrial pollution, whatever is in the exhaust of aircraft in flight, E.G.: particles of soot, vaporized oil and unburned fuel, ....