Yesterday I called Nature's Farmacy to order more the the Dogzyme Digestive Enhancer powder for my pups. I asked them if they carry fish oil. She told me that they didn't because they were concerned about the purity of the oil and that if the oil is not pure, it can coat the intestines and interfere with the absorption of nutrients. Also, that some fish is not even healthy for us to eat on a daily basis so why would we feed to our pups...I was looking at the ingredients in the fish oil that I am using currently and it has cod liver oil, sardine and anchovie oils. She recommended a powder base formula that they sell that has the same omega value as fish oil would. My question is this - was it a sales ploy to get me to buy the additional powder or is there some truth to the coating intestines thing??? Have you ever heard of this?