Trouble malting barley

[hank]

I've been working with all grain mashes ...25# corn 10# barley malt 5# rye.
I'm having trouble malting the barley.. it seems very inconsistent, sometimes it works sometimes not. 4x I've tried it. 1st I thru out thought it started to rot, 2nd worked good, 3rd some over modified, some under modified. Working on the 4th batch now, all batches were done the same I.E., I wash the grain, then soak for about 8 hr. drain, air for 8hrs. soak another 8hrs. then spread out on plastic to germinate, at which time some chits are just starting. Thing is it starts to smell like horseshit. The first batch had that smell then it kind of subsided smelled faintly sweet then like horse turds again, threw it out. Is this a normal thing. I have been buying barley malt but would like to get barley from local feed store and do it myself. Any ideas? By the way just got me an aerator to try the bucket in a bucket method I read about. Been readin awhile and have made a few runs, learnin enough to start askin questions. Thanks guys