PetArmor Hydrocortisone Quick Relief Spray for Dogs and Cats. PetArmor Hydrocortisone Quick Relief Spray for Dogs & Cats provides quick and effective relief from itching and rashes as well as other minor skin irritations your pet may experience like redness or swelling. Hydrocortisone soothes the skin and provides temporary relief to the area it's applied to, helping to discourage your pet from repeatedly scratching and further irritating the skin. This spray is safe to use on puppies and kittens 12 weeks of age and older.