did you flush for two weeks, trim and dry your buds correctly and then put them into cure? I have some master kush that doesnt really stink stink until at least 1 month in jars. 10 days is just the begining part of the cure. But also, maybe your seeds were something else, I know the OG KUSH seeds have only recently become available as it was a clone only strain forever...maybe wait a little longer like another 20 days at least...but I ain't never smelled hay except for some crap bagseed I grew one time.