just finished a different strain, Sweet Dreams, but I got a lil nervous about the same thing. Started to stink real good last 2 weeks of flower. The smell of hay during drying went away with curing as well. GrassCity has answered so many worries...
at 27days old the "bud" that your seeing is preflower, its completely normal to have no smell. I found after two weeks of flowering they started smelling like delicious bud. Peace and Love