HI there
Great website that i haven't come across yet.
I recommend Hills based on the research they have done. They have over 1000 vets constantly running trials. It is the most trialed food available and meets and exceeds expectations in AFFCO feeding trials.
Feeding trials are essential for any food and Hills is one of only a few diets that trial all their foods.
Eukanuba is much the same but some say palatability is higher.
I base on my recomendations on AFFCO based data because it is unbiased and very accurate.
They also make a point about soy protein that i disagree with. Firstly it is a good source of protein and secondly the two highest causes of food allergy are dairy and beef protein.
But if your guys are doing great then i wouldn't upset things by changing.
Also i wouldn't worry too much about how much protein they got as they were growing they need other issues to compound this problem to cause anything
Todd