MY Roo Girl was bitten again

My Roo was bitten by a copper head again last week. Poor girl, her face was swollen so big that she looked like a monster. She drooled and her mouth was kind of flapping. She was in pain and I was advised by the vet to give her benadryl in case she developed an allergy. Praise be to Allah she was alright after a day. Love that dog. She would put herself in front of me and she would protect me when she thinks I am in danger.