Fish oils are the best source of omega-3 and omega-6 fatty acids, which have been shown to improve skin health and reduce inflammation in certain canine skin diseases. Most veterinarians recommend finding a fish oil product made from anchovies or sardines. For dogs already eating a well-balanced diet that still need extra support, look for a sensitive skin and sensitive stomach diet. These often have a higher omega-3 fatty acid content and antioxidants to boost skin health. Sometimes, itchy skin on a dog can be linked to food allergies. The most common dog food allergies are protein-based (chicken, beef, pork, etc.). You may have success finding a limited-ingredient or single-protein source diet. Try to choose a protein your dog has not had before. Oatmeal has been shown to possess antioxidant and anti-inflammatory properties in both human and veterinary products. Used topically, it helps improve the skin barrier, moisturizes, and may even have UV-protective and antifungal activity. Colloidal oatmeal is produced by finely grinding oats and then boiling them to isolate useful compounds. It can be a great home remedy for an itchy dog.