I understand your worry. I think it would be best to find a veterinarian that you trust and listen to what he recommends.
Don’t trust Doctor Google, there is a lot of misinformation on the internet. And remember you can’t go to a vet and dictate what they do. Do you realize how insulting that is.
Give them some respect for knowing something. After all they went to school for as long as a medical doctor.
Contact the rescue organization you dealt with and tell them you need paperwork signed by a veterinarian to confirm treatment received so that you can continue the treatment accordingly …..if they don’t/can’t provide, that tells you something.
