Just looked at them and I would have to say yes they are webbed. It does not go all the way down to the tip of his toes but theres something there. Though I've never seen webbed paws before, I could be wrong. The shepherd would explain his black saddle, just pictured a shepherd mix as having long ears and a pointy nose which he does not have either. He does have long legs and a very lean build, his chest is not deep or broad. Though I do believe he needs to gain more muscle, he was in an animal shelter for 2 1/2 months in a small kennel, coming home he was very out of shape.
One thing that bothers me is his tail is docked. Normally pitbull tails are not docked, so why would they dock a mix's tail? Unless he was mixed with something that normally gets their tail docked and/or they thought he would look "cool" with it docked. I'm thinking boxer mix, maybe lab? Probably something else as well.
Something else strange, when it comes to his hair standing on his back(saw this last night with him barking at a cat) it only really goes up on his spine, like a mohawk from the top of his head down to his shoulders. Never seen this before on a dog, maybe I haven't been around enough dogs