
I think that like people different food will suit different dogs. I'm doing the opposite at the moment and changing one of ours from Arden Grange to Burns, but my others will stay on it as it really does suit them.
I do really believe in diet affecting behaviour though, but i don't think that it's always the most expensive food thats best for all dogs, it's down to each individual.
Hope your ok after your fall as well, see your girl was looking after you :-)
Paula