As long as she's sound, feel free to work her. Betadine scrub isn't too costly. I think I bought mine for like $15 but it lasts forever because you only need a little bit. Like JDI said, Bute is acceptable, I'm just reluctant to use it because it's such a strong substance. Plus, you can buy aspirin at the tack shop, you have to get Bute from a vet. And definitely get her a tetanus shot, as well as all the other shots if you're not sure her shot history; rhino, westnile, etc.