Oatmeal baths are one of the cheapest and most effective ways to help your itchy dog. There are plenty of expensive oatmeal baths, shampoos, and sprays for sale, but if you have a food processor or blender, you can easily make your own dog spa treatment.
Oatmeal soothes, nourishes, and moisturizes dog's skin (human skin too so feel free to use this in your own tub), one of our dogs suffers from allergies and a nice oatmeal and Epsom salt bath takes away the itching and keeps her comfortable. I give them an oatmeal bath about every 3 weeks. If you have an itchy dog, talk to your vet about causes and treatments, and ask if an oatmeal bath will help them too.
Step 1: Grind oatmeal to powder
This all-natural remedy couldn't be simpler, just grind as much oatmeal as you'd like (or can fit) in your blender or food processor until a flour-like consistency is reached (incidentally this would be called Oat Flour, and can also be used in baking).
I usually fill my Vitamix halfway with oats and use the tamper to get all the oats ground. If your machine doesn't have a tamper, stop the machine and use a spatula a few times around the edges. Do a few batches and you'll have plenty to last awhile.
Transfer to an airtight container and store at room temperature.