My 8 month old lab/ staff puppy that I adopted 5 months agi has suddenly started aggressively biting and nipping at my arms and leash pulling every time we go for a walk, to the point of bleeding. I am so frustrated and lost at how I can counter this behaviour. i have tried ignoring him and turning my back but he doesn’t stop, he just ends up tearing my clothes and making me bleed. Another time I tried to grab him and say no when he was jumping, and it ended up in busting my lip in the process. Most of the time he is great, he listens to all the commands I have taught him, even has forced naps in his crate during the day, goes for walks twice a day, has plenty of toys to play with. I am hurt, physically and mentally, it always ends in me crying and bleeding. I am worried he is turning aggressive, worse that he is gonna stick to this behaviour and not change, I dont know how to get him ti calm down in such situations, please help! How do I let him know that he is hurting le, or that he needs to calm down and not bite or leash pull ?

leash pulling #biting