Thanks for all your comments.
I have been told to only feed Jet, chicken and rice for now. The vet gave me some dog food in a recovery pack but he won't eat dog food. The problem is he won't eat much at all and it was usually ham. So now I'm struggling to get the antibiotics down him. I will just have to keep on trying. I suppose if he is hungry enough he will give in eventually.
We are back at the vets next thursday for his bloods to be checked again. The vet will give us a diet then if his reading are up again.