He really likes this food, and after the first few times he ate it—that is, after a week—the scratching has decreased

It suited our little dog and I prefer it as food because our vet recommended hypoallergenic food, since our little one has allergic reactions on her skin no matter how many good branded foods we tried. The last resort is the Hills medical food but it is extremely expensive.

Kids, it's a very good choice. For me, Gary has improved a lot with this food and he doesn't shed as much hair. His coat has also become stronger.

I have a chow-chow, purebred, who had dermatitis, redness on the skin, and was shedding a lot of hair, from one year old, especially when she changed her coat in May and June.
With various changes in food, we ended up with this one and since then her skin problems and hair loss have stopped. All of this was always done in consultation with the veterinarian she has had since she was a puppy. It goes without saying that I will continue to give it to her.