Is she on any scripted meds from vet or OTC not related to allergies? Such as heartworm/flea/tick prevention?
8 Months old only? Seems like a lot of flip plopping in diet dept. to really give anything a chance.
Welcome to the forum however. Hope you find help.
Any other skin symptoms other then hair loss?
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. - Unknown