We have a 12 wk old puppy who is way too rough!!! I know that all puppies mouth, but hers is more like attack and bite hard. We have her in puppy class, tried, ignoring, she continues to chase and bite. We tried blowing in her face, putting our thumb under her tongue, time outs in the laundry room and nothing seems to work. She has really long walks, tons of toys training daily, this does not work. Even the trainer and vet say she has a really hard bite. She chases my kids down, jumps and bites at them or their clothes. I know it is play, but she has broken skin and ripped clothes. Any suggestions would be appreciated. We love her and want to train her to stop being so rough.