Both my boys recently have developed very irritated areas in the folds of skin in their neck. I don't feed them anything with corn, they're treated for fleas, and nothing has changed. Stomps armpits also seem inflamed. I had been spraying Gold Bond spray on the affected areas, but I think Stomps hid the bottle while I was at work one day. Any idea what could be causing the irritation? It's been a very wet spring/summer/fall. Could that be it?