3 sources
Scent Glands
3 animals yield Scent Glands. Each is listed with the regions the compendium records for it.
Beaver (RDR 2)
Owanjila, Lake Isabella, Huron Glen, Shady Belle
Muskrat
Most waterways
Skunk (RDR 2)
Everywhere except for Cholla Springs
Where to find it
Everywhere except for Cholla SpringsHuron GlenLake IsabellaMost waterwaysOwanjilaShady Belle