I had nearly finished swopping Bob onto natures menu, using both nuggets and the blocks the then he got what the vet said was colitis or haemmorhagic gastritis. I don't know if it was caused by bacteria in puddles or food, but he is now back on Eden. Also when on the raw , he didn't seem to be digesting the tiny bits of bone. I still give him titbits of our human quality meat raw, but, Natures Menu left me slightly concerned. When it is prepared in a factory, frozen, driven, stacked in freezers, driven again to my freezer, there is always a chance for bugs to get a hold.
If I start feeding raw again ,I will only buy fresh meat.