Your foot looks really uncomfortable. My husband's eczema has been so bad at times that it looks very similar to how your foot does. He has healed up alot since the worst bouts of it but still deals with alot of skin itching. I looked Unker's Salve up on the internet... I'd be interested in purchasing it for my husband to try. But then there are a number of places selling it and you just never know who to trust as far as pure product goes.
Sending well wishes for both you and your dog.
I'd be interested in hearing about the mostly hidden story that has something to do with the backside of a dime.