Back in the day, we treated sarcoptic mange by dipping the dog in Paramite. I just googled and it’s still available. And yes, a person can get scabies from, say, forgetting to use gloves when dipping a dog with sarcoptic mange. :uhoh: Never mind how I know this.:lol:
Is the dog an adolescent? Did the bald spots start on the animal’s face? If so, it may be demodectic mange. All dogs have demodex mites. They don’t usually cause problems in healthy dogs, but dogs under stress (as in adolescence) will sometimes have itching and hair loss. I just googled demodectic mange and it looks like all the treatments for that are Rx only. So the vet may be the only answer if it’s demodex.
But there are things other than mange that cause hair loss. For example, allergies, thyroid problems, etc. I guess your friend could start by trying the Paramite dip (no Rx needed) and see if it works. Tell her to use gloves!
Just curious: why won’t the friend take the dog to the vet? Any idea?