“The study injected a substance called SAG,4 which activates the Shh pathway, into an 11-day-old chicken embryo. This disrupted the normally-precisely-controlled expression levels of the Shh pathway. As a result, feathers formed on the chicken embryo’s feet, which normally only have scales.5
…If the chicken embryo did not have the feather-making instructions, disrupting the Shh pathways would not result in the formation of feathers. The same is true for dinosaurs. Dinosaurs would only be able to form feathers if they already had the genetic instructions on how to do so.
Rather than supporting evolution, the results of this study show the brilliance of the Creator who designed the sophisticated programs that control chicken embryonic development.”
Read more here: https://creation.com/scales-to-feathers
