I pulled this off another forum from a gal who helped me tremendously with demodex. Her methods have proven to work for me; thought I would share this one for those who might have some itching problems going on.
Kenny likely has allergies -- and the feet take a beating because it's the first place they 'show' and the feet walk thru all sorts of green stuff, pollen, etc.
Try swishing Kenny's feet in black tea (plain old Lipton or whatever) once a day and dry with a turkish towel -- it helps. Be faithful tho -- but it will help.
You may also want to try Benedryl -- can help particularly if it's seasonally worse.
Teach him 'no licking' as a command. When you see him lick, GO TO HIM and massage the feet and say "no licking, Kenny". Distract him. Nothing will make him stop -- they TINGLE and bother him. And then once started it's an instant habit.
Huckle had bad seasonal allergies too and he was constantly chewing on his feet. It definately helped when I washed his feet and undercarriage off every time he came in for inside. It sounds like the tea bath would even be better.
I have experienced this too. Shyanne would bite so much and so hard, she would pant like she had run a marathon. She takes it by spells, and almost becomes obessed with it. The skin in between the toes gets inflammed. Benedryl helps as does ice. I will try the tea thing next time. Must be the tannic acid that relieves the itching.