Red top milk is not truely whole milk. True whole milk is the product that comes out of the cow. Once the cheese factories and cream products are extracted out of the whole milk you get red top "whole milk" as a by-product for us to drink. Some people have had good luck feeding this product alone, others add milk replacer to increase the nutritional value to the red top. Cows milk has different size fat droplets than goats milk or deer milk and therefore is not absorbed as well. Many people use the red top and do well so if it at broke, don't fix it. I use milk replacer formulated for fawns and that is what I recommend to producers. Good genetics are expensive to get, loose one fawn and you could have paid for alot of better milk replacer.