[anonymous]

I forgot to add to my post, the emergency vet that I took my dog to gave me the following advice. I had applied witch hazel to the dog’s chest rash and made the condition worse.

I would not use over the counter meds or apply anything topically to irritated skin unless a veterinarian that has examined the dog advises you to do so. That goes for supplements too.
Many allergens are airborne and are present all year round.
BTW: Environmental allergies get worse with age, not better.