Why is my dog's neck skin suddenly flaky and crusty? How to treat?
Flaky, scaly skin can be caused by a number of conditions, including allergies, ringworm, mange, endocrine/metabolic conditions (hypothyroidism, Cushing's disease), among others. It is possible that either the new shampoo or glucosamine supplement may be related to the scaling if Boscoe is allergic to either product. However, oatmeal shampoos are most commonly soothing to the skin and rarely cause reactions. Anti-seborrhea shampoos (here is one example: http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=21564) can be beneficial for oil, flaky skin, but require twice weekly baths initially. I recommend switching back to Cosequin rather than a generic glucosamine supplement since there is very little regulation and testing behind any supplement and Cosequin is manufactured by a highly reputable company. If Boscoe's flaky skin continues or if you notice any other changes in his water consumption, urination, energy level, or appetite, he should go to his vet for further evaluation. I hope that all goes well!
Updated on September 23rd, 2025