No idea, but I did wonder if this was under a patch of white hair?

There may be NOT connection, being different species and all. But white hair dogs routinely get skin "bumps" as they age, and these turn to the crumbly black scab and come off. I know there is a term the vet used other than "bumps," but I don't remember it.

Just saying, it could be nothing, so he -- the owner -- shouldn't be terrified of bad news by getting in to the vet.

If you do find out, let us know!