This site has a mix guide and calculator that should be able to help you. You can search by name brands that are available to you and they should come up. Foods are marked on quality and ones with concerning ingredients are mentioned so you can make the choice yourself (like for dyed foods and such). The calculator itself allows you to select foods and estimate the breakdown of protein and fat and fiber of a mix based on the percentage of the diet it makes up. If a brand youre interested in isn't already in the database you can manually add in the numbers in the calculator portion.