Do dogs continue to scratch after fleas are dead?
Yes, many dogs are allergic to fleas and will scratch after the fleas are gone. Dogs can also have allergies (very common in fall) and it can cause itching also.
Most likely not, As to the fact that fleas bite them to make them scratch, and that you can't bite anything if you're dead...
Yes, dogs get dry skin and other skin disorders like people. I had one dog that was allergic to dog shampoo and had to wash her with people shampoo or she'd get bumps like a rash.
Yes they get dry skin. Unlike my dog is allergic to fleas. I use a flea and tic oatmeal bath. If still scratching the get the anti itch spray and try that. O have that as well. Keep the dog sprayed with Adams flea and tic spray once a week as well.