Hi thanks for your question.
Although we do not see this often we have encoutered this a few times
I would ask your vet if he thinks this may be Plasma Cell Pododermatitis.This is an uncommon condition that affects all or just some of the foot pads in cats. In my experience it comes on quite quickly without any known cause. The pads begin to swell and get puffy, eventually peeling. Often the cats show no pain, discomfort or sickness, this can often be accompanied by a secondary infection which would explain the elevated white cell count. We treat this with antibiotic called doxycycline. We use this drug because of both its antibiotic properties and its immuno-modulating properties as this condition is thought to be immune mediated.
You can check the following website to see pictures of this and compare to you kitty
http://www.marvistavet.com/html/body_plasma_cell_pododermatitis.html
Technician
Practicing Veterinary Technician for 23 years. Veterinary Practice Owner, Technician Trainer