I have shampooed my jack russell with Hartz Ultra Guard Shampoo with oatmeal twice and had a nightmare each time. The first time I thought it was a fluke and something else caused it. My dog started itching and scratching horribly about 4 hours after each shampooing.
She literally chews holes in her skin for a month after each time. This shampoo definitely has something wrong with it. Nothing else could have caused the problem.