pitbull gnaws the stick

actions adrenalin aggression aggressive american anger angry animal assault attack background barking beautiful big bite black breed brown bull camera canine chewing closeup collar color confrontation cruel cute danger dangerous displeased dog domestic emotions evil expression face fang fear feelings fighting friend funny furious gnaws grin growling happy irritation isolated looking mad malicious mammal muscular paw pets pit pitbull pitbulterrier power powerful pretty protection puppy roar snarling spite staffordshire standing stick strict strong teeth terrier threats vicious violence white wicked