My 10-month-old lab pulls so hard on walks I've started dreading them. I got a harness that's supposed to stop pulling but it didn't help at all. Is this just h

No-pull harnesses don't teach anything. They reduce leverage so pulling is less effective, but the dog is still trying to pull. You've managed the symptom, not the behavior. Labs pull because pulling gets them where they want to go faster. It works. You need to make pulling worthless. Use a standard harness and a 6-foot leash. The second the leash goes tight, stop walking and stand still. Don't move until she creates slack by stepping toward you or sideways. The instant there's slack, start walking again. No verbal cue, no treat, just movement. Forward progress is the reward. For the first week you'll walk 50 feet in 20 minutes. That's correct. She's learning that tension = no progress, slack = progress. Most labs need 10-14 days of this before the pulling drops by half. If she's already amped the moment you grab the leash, burn off energy first — 10 minutes of fetch in the yard, then walk. A tired lab learns faster than a wired one.