Do you know what's in the mince? Some meats are more nutritious than others
I mix tripe, chicken carcass, whole minced chicken, and at the moment I have beef chunks (which don't have a great deal of nutritional value but they are nice and fatty and give his jaws a work out).
Depending on what's in he can also get liver, kidneys, heart, oxtail, cow tongue (NEVER AGAIN!!) etc. Eggs a couple of days a week.
Thanks for your replies, I didn't actually ask silly I know. At the moment i'm using it as a 'topping' for their normal food. Along side that they get bones a few times a week too.
I'll pop in next week and ask.