RE: Is There A Good Shampoo For A Stinky, Itchy Dog?
It does sound like your brother's dog probably has some kind of a skin problem . One likely possibility is that the dog has a yeast infection.
If the dog is scratching constantly, or licks their feet and toes , then this is a sign of a yeast infection, as is a bad smell, which is sometimes described as smelling musty, or even like "Cheetos" (cheese flavored snack food).
One helpful thing is to cut down on any sugars in the diet, since all yeast feed on sugars. Starchy vegetables like potatoes and corn also turn into sugar in the digestive system.
Another thing that is important is to bathe the dog, and then rinse with something that will kill the yeast on the skin. What is recommended is a mixture of a gallon of water with one cup each of white vinegar and hydrogen peroxide.
Here is a great tutorial that explains all about yeast infection in dogs, and how it should be treated to get rid of it.
Hopefully, this will also help your brother's dog !!