Looks like the webbing of the foot was plugged up with debris.
What are you wrapping the foot with?
Even though you were able to remove the debris. Rinse the cavity well.
I'd give her foot a soak in chlorhexidine. Let it dry with the Chlorhexidine on it. Put a dot of triple antibiotic ointment on a small square of gauze pad (not much ointment) and place that on the sore on the top of her foot. Wrap with vetwrap. Change daily. Swab the foot with chlorhexidine.
When you can, get someone to help take photos in good lighting for clearer photos of what's going on there.
What are you wrapping the foot with?
Even though you were able to remove the debris. Rinse the cavity well.
I'd give her foot a soak in chlorhexidine. Let it dry with the Chlorhexidine on it. Put a dot of triple antibiotic ointment on a small square of gauze pad (not much ointment) and place that on the sore on the top of her foot. Wrap with vetwrap. Change daily. Swab the foot with chlorhexidine.
When you can, get someone to help take photos in good lighting for clearer photos of what's going on there.