Looks like she injured the foot, and now it's inflamed and/or infected.
Without being able to look into it further, if they can't do much in the way of treatment, I'd say they can treat it with Blue-Kote or Nu-Stock. If they can do more than that, I'd recommend that plus a 5 day course of PenG shots, preferably with some additional oral probiotics.
Blue-Kote is VERY purple, and will stain everything it comes into contact with (it can stain even when dry). Still, an excellent wound dressing.
Nu-Stock is messy and smells like pine oil mixed with sulphur (because that's what it is). But it helps things heal from the inside out.
Most feed stores should carry at least one of those. Either costs around $12 - $14.
I think, with the swelling, the antibiotics course is called for. Bottle of PenG at a feed store: about $10. Syringes and needles at a feed store: varies. I get mine for 25 cents per syringe with needle (make sure you are getting needles). Keep the PenG in the refrigerator. Don't worry about warming it before you shake and draw the dose. Just shake it very thoroughly. See Tegan's thread on How to give a Subcutaneous Injection.
It doesn't take much. Medirabbit has the info needed to make dosing calculations. My nearly 5 pound minilop took 1/4cc (or mL, same thing).