some advise
My Miss Penny had the itchy face and paw thing going on for a couple years, till I finally figured it out, it might be worth a try to do these 2 simple things.
First was I put her on California Natural Sweet Potato and Herring dry dog food - within 2 weeks I noticed a big difference.
The second thing is, when Droopy comes back in the house from outside WIPE HIS PAWS ALL 4 of them. If you notice the grass outside in the morning and evening has a "dew", a wetness to it, well that dew on the grass has some sort of "film" that gets on the dogs paws, then when they come inside the house, they scratch their face, neck, and body and spread that film all over themselves and that is what makes them itch like crazy. I was told this by a women at a natural pet food store I go to, she talked me into buying some "herbal wipes" for Miss Penny, said to wipe her paws down as soon as she comes inside. Once I ran out of the herbal wipes I started to use a clean face cloth, and it worked just as well.
Just by doing those 2 things it cured the itchey/scratcheys ....I always wondered why Miss Penny would walk down the sidewalks, or on the gravel or dirt but never ever would go in the grass, she'd lay down outside on a towel or blanket if I put one down otherwise it was the dirt she'd go to, all those years she was trying to tell me and we just choked it up to her being a "miss priss" not wanting to get her feet wet or dirty, go figure
and Miss Penny would scratch herself bloody, had no wiskers for a loooong time, it was awful, I highly recommend california natural dogfood too, its made for allergy dogs, read up and you'll see.......please let me know if this helps, if it does, please shout it out to everyone else out here, God knows, our BW buddies need all the help we can get. looking forward to hearing the update.....God Bless and keep the faith