Well he's currently at the vets. Neither of the dogs were at all impressed at the lack of breakfast (Bella's getting some Burns in a buster cube to keep her entertained while she's on her own till the dogwalker comes).
Anyway the nice thing is the vet said that Zorro's "looking really great" (he's not seen him since his jabs), he was very impressed with his condition and he currently weighs in at a lean 9.7kg, so I think raising him on the BARF diet has been very good for him.
I can call the vets at 2 to find out how he is and pick him up late afternoon. I may not have access to the internet the rest of today though but will update when I can!