[FryFry]

Leo has recently started to show signs of aggression. He's been a nipper/biter since I got him but it's gotten worse over these 2 weeks. I've been doing everything I can think of; a firm NO. I'd put him on time out, I would redirect him with a toy, but nothing seems to work. The toy thing worked for a while but now it really doesn't. He's an extremely hyper puppy, and he's now beginning to harass my poor JRT, whom will just sit there and do nothing. I always have to pick Leo up in order for him to leave my JRT alone, and Leo will growl and bite my hands and squirm like crazy. He also has a habit of picking up random things outside; sticks, rocks, acorns, leaves, ect. I swear I'm taking something out of his mouth every 10 seconds. Tonight I had him out and I noticed him lay down and start chewing on something. I bent down to grab it out of his mouth, as I always do and he snarled at me. He lifted his lips and literally snarled. It was a very scary experience, especially from a puppy so young! I've raised 3 dogs from puppies. My Golden retriever never did anything like that, Zoey my female Yorkie was the sweetest/most laid back puppy. Leo is a total terror. He recently started biting at mine and my family members faces. He'll be totally sweet one minute then it's almost like he turns into a totally different dog. Whenever he bites my hands/fingers, it's not just a playful bite/chewing type thing, he literally clamps down really hard and leaves teeth marks. I have to pry his mouth off. I'm definitely going to start him in puppy classes once he has had all his shots, but until then is there anything I can do differently? I really don't want him to grow up to be aggressive, I want to nip this attitude in the butt before it gets worse!