Hello. I have a 3 + old shihTzu with allergy issues. She comes from Puerto Rico and since we moved to an Apt in North Carolina , her eyes water , she constantly scratch and bite her paws and legs to point of bruising . When I take her for walks or when she’s in the car she has no syptoms. Its only when she’s in the apartment. Seh did have so issues with one or two fleas and shes on medication . I give her benaydril 25 mgs (she’s 25lbs) and it somewhat works but I wonder what else I can try . Anyone have ideas ? Thanks