I love your Sharpei - I want it!!! - I look after a sharpei cross - more like a sharpei than the other breed! I put that on ND puppy (yep - i'm in charge of food) initially, and have just started it on ND lamb - it is in beautiful condition.
Berriewood is the cheapest place by far - but you have to be ordering a few outers to make it worthwhile
regards
DT