Thought I would give everyone an update - its been 24 hours and after a tough night (he was very subdued, vomited a few times) seems to be ALOT better today. The spots are still there but not nearly as inflamed so am hopeful that with a couple more days will be even better. Hes back to being playful too - phew.
I also tracked down a Canidae supplier here in Brissi, so have already started the slow process of switching him off RCanin to the grain free all life stages Canidae. Thanks to anyone who helped with the food rating thread - it gave me such a head start! He seems to prefer it already.
Some updated pics here