I give it a 5/5 because it has some details that matter:
1) It contains taurine, which is necessary for the heart.
2) It contains all the vitamins in full and has a sufficient amount of cartilage for the joints.
3) It contains only first-choice ingredients and not bones and derivatives (at least that's what it says).

I had another brand (mongoe) and it had dandruff, I switched to this one and now it's for the advertising of l'oreal! (golden retriever)
The morning stools are hard and formed, during the day they are softer, and by the end of the day they are almost shapeless, but I feed them 5 times a day.
It causes gas, but I don't change it because taurine is VERY important to me, as studies with grain-free food have been linked to heart diseases (check the relevant article in the American Kennel Club) because they don't have taurine... look it up.
Oh, and something important: I had to contact Farmina for some questions and they called me back, and I was impressed by how polite and willing they were to help... and they have a representation in Greece!
Try it, it's worth the money as the ingredients are on the level of acana/naturea.