Could possibly be an allergic reaction to the shampoo they are using. Next time ask them to use a hypoallergenic shampoo on them. You could give them benadryl for the itching for now and reshampoo them using a hypoallergenic shampoo. If you take them to the vet, she will probably give them apoquel which is a new med on the market that is better than cortizone. Apoquel doesn't have the bad sad effects as cortizone, it works by blocking the itch sensory. My Zoey takes it for her allergies. Since we live close to one another, I have the apoquel if you want to try it on your dogs. There are no side effects to it.