Nope - I wouldn't trust my girls to know when to stop licking the sweeties...
Mine have red rockies, and if I think one of them needs it a mineral (sheep) drench with added copper. But at the moment none of them will eat Caprivite, or garlic or seaweed... so nothing else other than shreds, calf mix/dairy nuts and rolled oats. Plus carrots, apples and bananas, some cabbage/kale leaves. All are doing well.
Now that I have only Shetlands I have stopped using the buckets on the sheep too, found that the Shetlands ended up with mucky bums... prefer to give concentrates/shreds if needed. But I have a small enough flock and can feed twice a day and make sure that shy eaters get their share too... so probably different from "mainstream" sheepkeepers.