Been feeding distillers syrup in lick tanks and the cows are averaging almost 4 gal/day. I can't get them to slow down. WOuld like them consuming 1 gal/day. I've tried a 50 lb. bag of salt in on a fill and they still suck it down fast. Any ideas what I could add to "bitter" it up and slow down their intake without totally turning them off to it? The syrup is pretty much identical to Mix 30 minus the mineral pack. I know this because the trucker who hauls it, also hauls for mix 30 and he stated that all they do is add a mineral pack and distribute it. Any ideas?