I need your help. We just adopted Porter a couple of months ago. He is now 10 months old. Playful and energetic likes most young lab. The biggest challenge is that, out of no where, if could be at the beginning of a walk, after sitting, he becomes nuts and start jumping on me, not like people seems to describe like the zoomies, running around like crazy. This, I could still live with it. But he jumps on my back, my legs, mouth opened. It hurts and he is so strong, more than once, he almost make me felt on the ground. It happens outside, most of the time on leash but sometimes in the backyard. I tried to observe to see what could trigger it but, it always seems with no reasons. Help me, please. We are in winter and I am well padded but I really don't know how I could survive this type of behavior with lighter cloths.