Since my favorite visit Dogs are not just within reach, I tested the food at the Golden Retriever dog of a neighbor. The first warned me however, that from the test probably will not, because his bitch was very tricky with their food (one could also say: totally spoiled).
Of anything was then, however, to remember. The dog lunged formally proffered to the sample, and probably would have plastered the entire pack contents if I had left it.
According to neighbors she has well tolerated.
About long-term effects, I can not say anything, but compared to other foods seems to me that to be really high. (And for my favorite dogs visit is still plenty left.)
However, the price is pretty steep.