Buy the gun to go with it. Makes it easy to administer. The cartridge gun that they have on the PBS site above is the one you want. You can have it on 5cc so you can just keep the stuff in the big tube and administer 5cc. My goats love the stuff and I can just hold it out and they will just eat it. Yes you can give it on top of other things.
If you are feeding her grain, you could even put some safflower oil on her grain for added fat.