Wow, Adelaide looks very much like Buckles. The hair on her legs and tail look longer but that face is spot on.
Funny because I didn't know ACD's could be primarily black until I met a lady who bread them. She had two pups that were black. Until then I thought they were either "blue" or "red". I did an online search afterward and saw a lot of black ones. Who knew.
Having had a GSD, I'm inclined to agree with the vet on Adelaide. That posture, and her torso definitely look Shepard like. I can certainly see where you got Dobbie though, from the markings. Turns out those brown patches on the legs, chest, eye brows and ears are typical of the ACD too though.
Cute ACD pup for reference ↓↓↓
Buckles rides in my truck every where I go. She rides so often I made her a "dog deck." Somewhere on the forum there's a thread about them, so I'm not the only weirdo to do it.
Not the best photo, but it shows the general concept.
View attachment 122178 fub time ahead.