I've just ordered a small bag of the puppy Orijen for my 16 week old staffie who since I got him has had a BAAAAAD rear end. (runny / sometimes diarreah / sometimes hard / sometimes just constantly dripping / lots of wind) A lot of the same sxs as a lot of the pp have. I'm sure the constant changing of diet has a lot to do with it as well as him being ultra sensitive.
Supercoat gives him wind and runny inconsistent poo's, Pedigree Natural (I know, but less protein so I thought it was worth a go) was the same and he was eating it, I tried adding turkey mince and this too has given him the splatters.
So fingers crossed the Orijen works and I can move on from this new "poo obsession" I have and we can be a happy family!!