James - I would recommend a low starch limited ingredient diet food. Your dog may have food allergies so this would be the easiest first step to potentially solving the problem. A brand like Zignature would be a good option!
James, some dogs have allergies, reacting to their diet. Chicken is known to cause problems with poodles. So stop washing the dog and make a vet appointment. Washing a dog too frequently can also cause rashes. Use a flea and tick medicine recommend by your vet.
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