I use a probiotic paste to get them started but then switch to dirt. If you take a shovel and skim a few inches deep of sod and then turn it over grass side down you can get them not only to eat the dirt but they get started on eating plants as they will eat roots from the sod. If you are feeding probiotics you may not need to worry about the dirt. Its just what has worked for us. The fawns seem to think its a treat to as they really enjoy it when its fresh dug. We have also fed water out of the bottle and doesn't seem to be a problem however we don't let them have too much as we try not to fill them up to much. Don't want them blowed up and sloshing around. After about a week we start feeding them hand picked clover,greens, and leaves. We keep them in a building for a week or so but then let them start going out into their pen. Once they have imprinted you as their provider you can let them have some more space to roam as they will come running to you. As far as the amount of probiotic to feed my paste says 2 to 5cc. Yours should have an adult dose and a newborn on your tube. We usually fill up a 3cc syringe and stick it into the back corner of the mouth and squirt it in slowly. Rick