awww, he is just so adorable.
I'm not too sure about the oregano oil on the heel, but i know Damiens mum (forgot her name) Aria?, uses it on his heels and has been doing so for a few months.
I am not sure where to get it, but i fugure if you go to your local health food shop/naturopath, then they should be able to help.
You can even google it, and surely you will find something there.
This is a good question for S.D, who has just dissapeared and has not posted in a while.
Hopefully he too, might see it and reply.
Good luck.