Sometimes you'll get odd smells that aren't the dreaded hydrogen
sulfide, especially with fruits other than grapes. It appears that
you're still in the primary, so try to whip some air into these
batches. It will help the yeast take off, and remove some H2S that may
be forming. Another thing to try is to add some yeast nutrient. If
you want to see real foaming, you should add activator as well as
nutrient.