My 2 yr old male choc lab skin has become very dry,flakey and itchy.Need advice on how to help him.He is on a lamb/rice dog food for sensitive skin.He goes to doggie day camp 1 day week,they have been having water fun day on the day he goes and gets a bath there afterwards.Im wondering if the weekly bathing is causing this?Im sure it cant help.He is otherwise very healthy.No fleas or ticks.