Hi Marina! It's great that you're following Dr. Pierson's recipe. She has inspired so many people, it's incredible.
Because Ruby has kidney issues, I cannot feed her anything with ground bones, so I'm sorry to not be helpful with your question. So far she eats turkey, bison, venison, and beef and she likes them all. I also have commercially made duck, rabbit and venison from Primal that I use as a topper sometimes to add some variety to textures, but I add that sparingly as that has bone in it. Since I've really just started to make Ruby's food in the last month or so, I'm keeping everything simple by buying ground boneless meat and adding EZ Complete from Food Fur Life as a supplement to complete the blend. EZ Complete has liver in it so there is no need for me to add it, but there is another supplement called Alnutrin that allows me to add my own liver should I decide to get more adventurous in the future. Instead of bone, these powdered mixes have calcium in the form of egg shells which has less phosphorus and therefore is better for her kidneys.
I love to cook and since the pandemic I've been spending more time in the kitchen than ever, so adding Ruby's food to my weekly and daily routine is a pleasure.