To see how their formulas differ, I created several pet profiles: an older, overweight dog, an active puppy, Taco (an active young adult) and Dot (a dog with dietary restrictions). Formulas selected for all profiles use the same ingredients list, just in slightly different order.
The old, overweight dog gets slightly less protein and fat and slightly more fiber, standard for a weight-control dog food.
Taco. The only difference between his and the puppy's is chicken fat and sweet potato are reverse in the order of ingredients. Taco's food has amounts that are standard for an adult food and calorie count is nearly identical to his current food.
But it became obvious that the formulas are not customizable. When I made a test pet with all allergies marked (Chicken, Corn, Wheat , the formula given still contained Chicken and Potato. The website says "An expert will review your pet's allergies before finalizing your order. Petbrosia does not contain corn, soy, or wheat." But had I not read that small print, I could easily have assumed that the formula the website produced was right for my pet and was instantly given the option to order it. When I contacted Petbrosia about this I was told that every order is reviewed by an expert pet nutritionist before processing and if they are unable to remove or adjust to what the consumer request they email or call the customer to let them know.
In the case of Dot who cannot have fish oil or fish ingredients, I was told that Petbrosia is "unable to remove the fish oil. As this is an ingredient that can not be taken out as by removing fish oil would change the omega-3 to omega-6 profile and would not be beneficial to the pet." The formulas they offer are equivalent to standard dog food and not truly customizable and that's a shame. I thought this would be a great option for those of us who have pets dealing with food sensitivities. But it sounds like that is not what Petbrosia is for.
So I went ahead and ordered a blend for Taco, who has no diet restrictions. He ate the food, as he would any food you put in front of him. One thing I noticed was that the recommended serving for him was 2 1/2 to 3 cups per day. I had been feeding him almost 4 cups of his previous food, but the calorie content was about the same. He had not been getting fat previously but he HAD been super active, sometimes with excess energy he didn't know what to do with. The feeding guidelines for Petbrosia reminded me that I could probably just feed him less food and bring that energy down to a manageable level, and that is exactly what happened.
One neat thing I do think they have going for them is that the website will track your pet's changes and the algorithms will adjust based on the information provide; therefore, the blend will adjust to your pet as your pet ages. Without even having to think about it, Petbrosia will start to send you adult food when your puppy becomes a full grown dog and then as it grows older, the formula will adjust to senior formula.Disclosure: Petbrosia provided me with one 3-pound box of dog food to review. I was not compensated in any other way and the opinions are all mine and the dogs.