i think your assumptions about the fat may be correct tanis. i have had a similar experience. i buy buffalo from a place in telford, pa. thru a co-worker who lives next door to the ranch (so i am absolutely sure where the meat comes from, and how it is treated. go to hillsidefarms.biz to check it out). a few times, i have bought ground buffalo that tasted gamey and was particularly fatty. i pan fried it, and was surprised how much fat came out when cooking. normally it's so lean. a week or so later, i decided to finish off the buffalo when grilling one night, and noticed a distinctly different taste, less fatty and also gamey. the smokey taste might be hiding some of it i thought. but you may be on to something. people often talk about how much of the flavor of a piece of meat comes from the amount and distribution of fat, so maybe gaminess follows the same rules. any wild game hunters know about this?