Hi. my dog has the same problem (itchy, smelly, flaky skin) for the longest time. We started giving her fish oil (coatex) in April, and now she is a happy dog! No more scratching and licking, you can see the difference around a month after taking the supplement. Give it a try...
DOG with ITCHY/FLAKY/REDNESS/SMELLY skin problem, Need help or advise