What a cutie!

I can't believe it but I do see some PBGV, they are a pretty rare breed so it is unlikely he is mixed with a PBGV but you never know.

His colors indicate that he has a breed with some ticking, like a cattle dog, pointer, setter, etc... Cockers do have some ticking but it's limited to their muzzles & feet (usually on a well bred one anyways).
He also has the tri colors and spots which are commonly seen in hound dogs, like beagles.
his feet look almost like a medium-ish sized dog... possibly a beagle?

It is hard to tell breeds in mixed puppies, as they age you can usually get a better guess.