I personally don’t like pellets with the added colourings in them, and Versele-Laga do not state which colourants they use. P15 also has methionine in which I dislike too. I personally use TOPS pellets and Harrisons Adult Lifetime, and I also use a high quality seed mix Delinature 61, as I like my amazon to have a good mixture of textures, and I don’t believe the pellets have to be better than seed argument. My Conure had Delinature 64, as they can have a higher fat content than Amazons. You shouldn’t need to give a vitamin supplement when you are feedinga pelleted diet, because they vitamin content is already included. Keep on trying with fresh foods, these are an important part of the diet...my birds love sugar snap peas, and thawed frozen peas. I give my Amazon a warmed piece of steamed sweet potato every morning so I can ensure some beta carotene intake.