My dog has long hair, so I only noticed this last time i gave her a bath. She has a patch of bald skin on her back. It's small, probably 1 inch across, and a little flaky. It's near where I usually put frontline on her, so I'm wondering if that could be the cause, although it's been a few months since I've used it on her. I noticed it about a month ago and have been watching to see if it goes away, but it hasn't. Should I be concerned?
As a side note, we adopted our dog while living in Africa, and have since brought her to the states. She's been here almost a year now. I'm not sure about her vaccinations or previous vet visits because she's my cousin's dog and has only recently come to live with me exclusively.