Gather supplies: sharp knife, spare blade, nitrile gloves, game bags (or clean cloth), rope/twine, paper towels, bucket or trash bag for waste, headlamp, zip ties, and a cooler with ice
Choose a safe location away from traffic and hazards; keep the deer on its back if possible
Put on gloves
Remove the hind legs by cutting around the hock joints and freeing the legs from the pelvis
Make a shallow cut around the anus to free it from surrounding tissue
Free the rectum and pull it away from the body cavity; tie off or clamp the rectum to prevent leakage
Cut along the inside of the pelvis to open the body cavity without puncturing organs
Make a cut from the pelvis up to the breastbone; keep it shallow and avoid the stomach and intestines
Open the cavity and remove organs carefully by working around connective tissue
Remove the diaphragm by cutting where it attaches to the body cavity
Cut the windpipe and esophagus near the throat and free the top of the digestive tract
Remove the heart and lungs with the windpipe/esophagus as a unit; set aside if desired for separate handling
Remove liver and remaining organs carefully; avoid puncturing the gallbladder
Inspect for punctures or leaks; wipe clean with paper towels and remove contaminated tissue
Remove kidneys if desired; otherwise leave them in place until later processing
Cut the neck skin and free the tongue (optional depending on local practices)
Trim excess tissue and blood clots; keep the cavity clean
Rinse only if allowed/necessary and permitted by local regulations; otherwise wipe with clean paper towels
Roll the deer onto its side and remove remaining blood/fluids by draining; keep cavity open for airflow
Prop the cavity open with a stick or by positioning the carcass to allow cooling
Skin the deer if desired, or proceed with bagging/transport as-is depending on your plan
Place a clean game bag over the body cavity and legs; keep hair and debris out of the cavity
Cool the carcass immediately: get it to shade, airflow, and as cool a temperature as possible
Keep the deer from direct ground contact; use a rack, boards, or elevated surface
Transport promptly to a processor or for your next step in processing
Record tags and comply with all local regulations for tagging and field care