Shylah,
I am so sorry! I thought I had answered all of your questions on the other thread. Since your baby is so small, I would definitely grind. I'll let others chime in, but I think that would be your best option. Many meat grinders out there even grind bone!
Again, a prey model raw diet is completely balanced. Giving supplements will UNbalance causing potential problems. The only thing we add is salmon oil for the omega-3s to make their skin and coat soft and shiny.
Lastly, the general rule is 2-3% of expected adult body weight but since she is a puppy and SO tiny I would probably feed closer to 4%.