I don't even have to mix with sweet feed or molasses or anything. Magic's just goes into a normal feed [grain and chaff]. She doesn't hesitate, just digs straight in and cleans it up. My gelding is much the same but the difference is he'll try anything you offer him... anything... hahahaha
I have no idea what uniprim is - I'm Australian, we have different names for some things.
I need to get a photo of Miss's leg tomorrow. It'll be 13 days post-injury and I didn't get a photo when she first did it [my first thought was, let's see how bad it is, does she even need the vet? and then second thought was, yep, needs stitches, call the vet - photos didn't even come into it until 2 days ago] but I'm interested to see what happens regarding scarring.