[Superpup]

Yes, one bite can cause severe itching for several weeks in dogs with this allergy.

Yes, use Aveeno Oatmeal Bath. Mix with warm water in a cup or dish, and apply a little at a time and gently massage it in. Put warm (not hot) water on baby to keep him/her warm during bath. Leave it on as long as possible, wet, and rinse gently and thoroughly.

Benadryl will ease the itch, 1-2mg per lb. A good, natural moisturizing spray, like Veterinarian's Best or hydrocortisone spray for dogs will help. If skin feels hot, use cool (not cold) compresses for a few minutes.

My guys get a few fleas even with Frontline. It works as well as the natural sprays with de limone, citrus, eucalyptus, lavender, etc.

High Cascade Premier Shampoo was recommended by RLC12345678.

Try to distract from the scratching, and best wishes, because I know what you and baby are going through.