I would start her off maybe supplement twice a day and see how she does and if you notice she isn't gaining after a bit, then increase it to 3 times. Yes, I call the chick feed moistened in water the mash. Yes, you can get powdered vitamins at the feed store or you can also use the Poly-Vi-Sol infant drops. Just be sure it is the ones that do NOT contain iron in it.
RIP Sweet Honey! My blind girl who didn't survive the flooding Sept. 2011. You will be very missed by all!!! Honey is my avatar.
Currently have NN's, brown leghorns, salmon favorelles, showgirls and more silkies than I can count!