Thank you for the additional information - it helps! I would take Dexter in and ask the vet to check his thyroid. Any time there is a major change in coat texture like Dexter is experiencing, it could be tied to hyperthyroidism. Fortunately, he is a young boy and hypethryroid can be treated or cured. You might also try adding a product to his diet called Prozyme. This puts necessary enzymes and fatty acids into the body that he may be lacking. You can get this at most pet supply stores or online at www.revivalanimal.com. The fatty acids will help greatly as to his coat condition and dandruffy skin. Finally, you might consider treating him with Revolution. Although marketed as a flea preventative, the dandruff you are seeing on Dexter may actually be a body mite - often called walking dandruff and the Revolution will clear that up in a relatively short time. None of the other topical flea products will take care of that problem, but Revolution does a great job with it.

Please let me know if I can help further!