Dear Dr. Fox: I have a 10-year-old Yorkie who scratches and acts like she’s being bit, but no fleas are on her that I can see. She chews her feet constantly, too. In a recent column, you said this ...

We don't like seeing our pets itch and scratch. I've treated lots of them. Our best management, back in the day, was corticosteroids like prednisone but long-term use often led to serious problems.