He looks mostly Lab to me...maybe mixed with Golden Retriever.

I don't think those are really white "stripes," it's just a lighter spot in his coloring that will probably even out eventually. I've seen a lot of yellow Labs that have those.

Either way, what a cutie pie.

I remember from a later post I read of yours that you mentioned he stays outside most of the day...does he still??? I really hope that since you mentioned he's getting a little bit better with the barking that he is able to spend more time in the house with his family.