What are you feeding your nursing dog?

I've cooked up some pet mince with pasta and veggies which she gets at night for dinner, she has dry biscuits out in the morning, and im also giving her some of the puppy formula (which says on it that its good for nursing dogs). Is this diet good enough for her while shes nursing her pups? She has 12 so she has a big job, but shes doing really well : )