You will need a local animal/dog attorney for this situation. Yes, you can treat at home if you can show that you were actively treating the dog's condition and it was making progress. Getting an attorney sooner rather than later will keep costs down, as they will charge per day for seizing the dog and charge for the treatment.
Is there anything else in this fact pattern we should know? Any prior history of "neglect?"
My colleague is correct in that you need to find an animal law lawyer here pretty quick.
Collect up your receipts of purchase for the mange cure to help show active treatment of the ailment. I find it hard to believe that there would be in Georgia some law that prevents one from treating her own animals. Seems ridiculous. Sounds like there may be neglect charges.
Get a lawyer asap and best of luck to your neighbor/friend!
This reply is not an attempt to solicit business. Tara Millan's reply is not to be considered a legal opinion regarding your inquiry. No attorney client relationship has been established with Millan's reply to your inquiry. Your matter is state specific and state laws and regulations most likely apply that are not mentioned in this reply. The information provided was in reply to a general question and cannot be relied upon as legal advice, nor does the information provided establish an attorney client relationship. Seek out an attorney with whom you can fully explain your unique situation and enter into an attorney client relationship with that attorney.