My puppy is afraid to walk outside; treats don't work. What to do?

Poor Tyson! It sounds like he's very anxious about walks for some reason. Without more information, it's hard to say if he is afraid of the leash, or being outdoors in general.

Other than taking him outside to potty, I would stop trying to take him on any walks right now - dragging him outside and forcing him to go is probably making the problem worse, unfortunately. Instead, start wherever he is comfortable and use very tasty food treats - things like chicken, roast beef, hot dog slices, or cheese often work well for anxious dogs.

For example, you might sit on the doorstep with him at first and just feed him a handful of treats, one at a time. Do this a few times a day, until he seems comfortable and happy about sitting on the doorstep. At that point, you can try taking a step or two into the yard or driveway - sit down there and feed him treats again. Gradually work up to walking a tiny bit further each time, as long as he seems relaxed and happy - if he gets scared, just stop and back up to where he was comfortable.

If you don't make any significant progress with this approach in the next 1-2 weeks, I would recommend making an appointment with a veterinary behaviorist to address his anxiety issues - this level of fear of normal, everyday things is very worrying in a puppy this age. The behaviorist can help you put together a more detailed plan to help him, which may include medication if needed for his anxiety. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org