I dont know. We always thought maybe Terrier (those ears and some parts of his hair) and a German Shorthair pointer (ticking, hunter and body shape). But some times he looks part greyhound. Plus in the area where we found him we have seen a male GSP that gets out and runs around but that could just be a coincidence
Hes probably about 43-45 lbs so he is kind of small (small to me and compared to Kassie)
Oh your dogs are adorable! Jeffrey reminds me of my dog Katie cause of the ears and snout. but her features are somewhat different. She's got a lot of brown in her as well as some black on her tail and backside. I'm thinking she's part hounddog too.
I'd guess that Jeffrey is a mix of more than two breeds. A couple of them being hounds and the others possibly terrier or cattle dog.
The tail is from the hound family for sure, as well as the topline, neck, and head. Possibly whippet since one of his head shots made me think whippet immediatly.
I really don't see anything of a gsp in him other than the ticking and the solidness of his body which could come from many other breeds.
Whatever mixes went into creating him they sure blended into a cute package.