Glad to hear that nothing's broken! Betadiene wouldn't hurt to prevent infection if there's broken skin. As far as the oral dosing goes - feeding daily for a few days sounds like a LOT. However, I'd call and consult the vet before doing anything differently than they told you. Medication injected into a rat is likely to have a different effective dosage than direct oral dosage. Also, you'd need to be careful to avoid the glottis.