No idea what breeds are in my boy Jack [Breeds]

I've gotten different answers from everyone I've asked! Vets, friends, family, dog lovers, they've all given me different answers. He's approximately 6 months (stray) and 35 pounds. Thoughts? http://ift.tt/2sdGTZC http://ift.tt/2qUQC2Y http://ift.tt/2se4toT via /r/dogs http://ift.tt/2qUPDQm