I've looked on this site and elsewhere online, and I'm not totally clear on how to tell a red coat from a light sable.
When we got Jack as a puppy, his breeder said all the pups were red-and-white. His mom was red and his dad was a tailed tri, so she was hoping for some tris and was unsuccessful in producing any.
When Jack lost his puppy coat, I noticed he still had a sprinkling of black hairs on his cap, the backs of his ears, along his spine, and at the base of his "tail". I didn't think anything of it, except to assume he got the black hairs from his tri dad. Now that I am reading more about colors, I wonder if he might possibly be sable? To look at him quickly he looks red-and-white, and that's what his papers say. But on closer examination, there are those black hairs. Can a red dog have black points? Or would that qualify him as a sable?
Here's two pics. This one shows the darker hairs scattered on his cap and the backs of his ears.
This one shows the black tips on his bunny bottom.
Now that he's blowing his coat, when I brush him I can pull out individual guard hairs that are very dark brown or black, along with the more profuse red and white guard hairs.
And yes, my pudgy guy is trying to lose a few pounds. :-)