Glad to hear he was saved and found a home with you! When I got Gracie she was 3 years old and took about a month or two to get into a good eating routine. She would regularly skip meals and I would often have to coax her to eat. Now she goes crazy for all kinds of food and especially loves her dehydrated raw food.
I find the dogs like a wet food much better than dry kibble and with the dehydrated raw you get better nutrition without the work/freezer space for raw.
Good luck with the transition!
Lady (1.5 year old tricolour) & Gracie (4 year old blenheim)
"Happiness is a warm puppy" - Charles M. Schulz