I agree with Patty -- Toby looks like he's got some Lab in him. Still, I've met lots of mixes that looked Ridgeback-ish and who didn't have any RR in them. There was a litter of Lab-Boxer puppies advertised here that were dead ringers for ridgeless RR pups. We had a black mouth cur dog in rescue here who looked very similar to a ridgeless (a breeder incorrectly IDed him as RRR), but whose behavior couldn't have been more different. Without a ridge to tell for sure, it can be hard to tell.
There are those DNA tests available at Petco if you're dying to know, but at the end of the day, he's your special boy and "what" he is is a million times less important than who he is.
Litter announcements / solicitations are by approval of the Administrator/CoAdministrator- only.