Petbrosia does have 2 base formulas. They cannot add or remove ingredients from them. The only way they “customize” is to increase or decrease the amount of said ingredients. For instance, Laverne, had the Salmon grain free with 25 % protein and Rupert and Hazel had the Salmon grain free with 30% protein. Some of the other percentages were different between them, too. Laverne is 2 years older than Rupert and Hazel. The ingredients for all three bags of food were exactly the same and in the same order. Hope that helps. Imho, it isn’t really that customizable. I think the formulation is okay but with too many lentils and beans for my taste. My dogs seemed to like the sample bags fine, however, I only used some of the food as treats. I would also like to see some limited ingredient base formulas.
