My Scout had vasculitis, among other health problems, and in his last few months our holistic vet suggested using heating/cooling foods to help him regulate his body temperature better. I don't know how much it helped him, and it had to be balanced with what he would agree to eat, but it made me feel a little better, whipping up home cooked beef/sweet potato meals and egg white omelet dishes for him.
We'll hold Sparks and his family in our thoughts.