i got a dog and this coat is not healthy, some hair loss, anf my parents is not going to bring him to a vet. so i am wondering if better food will help, how about fish oil?
A good quality diet will often help improve a rough coat, and adding fish oil or Dr. Maggies will give it an extra boost. It takes time, though, to see results, so keep at it. After a good month, you should see some improvement.