Put up a pergala.
I've seen dozens of pool noodle hacks, but, never one for a dog collar. Wouldn't it be too bulky?
Get the smallest diameter noodles you can find. Cut to the length you need for your dog. Use 2 pieces of plasticized wire (in the craft dept. or store) to run through the noodle. Attach one end of each wire to one end of a buckle so you can close the dog collar around the dog’s neck. I don’t know how safe or secure this would be, but I’m sure you have a design in mind. Please post on Hometalk.com!
I have seen these used instead of a cone to keep your dog from licking a wound. They were cut in to sections then placed on a thin collar, longer than normal. However, I don’t think it would help if the wound was on a paw.
Here is a post. https://www.pinterest.com/pin/ARjpXid9FAhqhTvbwCjtPZ3o1avF2dHTupK6XVwgVOdGdIytK4vGmwU/