Get 1 undamaged black bear skin is an objective in the Main Quest, Doctor's Orders in Far Cry 5
Liberate Mastodon Geothermal Park
Get the doctor's bag
Secure the area
Bring the bag to Dr Charles Lindsey
Get 1 undamaged black bear skin
Get 2 undamaged pronghorn skins
Reach Dr. Charles Lindsey's Lab
Talk to Dr. Charles Lindsey