Often frequent feet licking (and even chewing) is because they have itchy feet from the grass pollen when they go outside. He recommended to wipe down with a wet cloth, then dry cloth every time they come in from the outside. Well Smudge goes in and out about 2000 times a day, so he said give a 25mg Benadryl (knock-off brand is OK too) twice a day, and that should take care of it.
For 9 years she's been licking her feet and I just thought she had OCD or was crazy. Now I feel awful! Poor Smudge has been itchy for 9 years!