I'm sorry Wookie is going through this. Aside from an e-collar to prevent gnawing at his paws, you may want to consider, protective dog boots. I carry indoor boots that are very breathable, comfortable and can be worn for long periods of time.
Feel free to take a look here:
http://www.alldogboots.com/Mesh-Summ...-p/ssmblue.htm
You can also see them here in a customer photo:
Napolean's Allergy Relief
It would be so helpful to know if it's an allergy or if it's a behavioral issue. These things are so difficult to deal with, as you know with your other dog.