CS>Dog w/toe fungi problems

[Michael Brown]

My friends dog has a toe fungi of some sort that itches, and turns pink. My 
first thought was maybe a strong batch of CS gel might help. Anybody with any 
expertise in this area?  Dog is likely going to lick it off before it can kill 
the fungi, so that needs to be addressed also.  Has had the condition for 
several months now. Thanks in advance from the dog and my friend.           
mlbrown    ps.  Any other ideas, not involving toxic chemicals are welcomed.