Engine oil,holy hell! I use camrosa ointment on my dog he has the same problem and it is the best money I've ever spent.friend also uses it for his terrier when she got itchy and started going bald.
Great seeing all these old dogs still going/getting to a ripe old age.and that people keep them for life.to many dogs get passed about.wish i knew how to put pics on our old bitch is 13 and still going strong to this day and here mother was 14 when she got her last litter of cubs