Oh my. A tiny pinky baby.
I would recommend that you purchase a mini and a regular Miracle nipple from Henry’s Healthy Pet. These nipples are the best and will reduce the chance of aspirating. Be very careful that Peanut doesn’t aspirate formula. Just precious.
Is the baby pooping and peeing normally? The reason I ask is because sometimes tiny pinks have difficulty digesting commercial formula. If that happens and bloat becomes an issue you would need to switch to the Goat Milk Temporary formula. If everything is working well, I wouldn’t change a thing.
Is the head bruised? It looks purple to me.