My collie x lab girl is 17 weeks and doing brilliantly with training. But ... She just but me quite hard and it's bleeding. I put her lead on at the end of the woods before we got near the road and she began chewing the lead and growling, then wrapped her teeth round my calf, it's only a slight wound as I was wearing jeans but it could have been worse.
I'm shocked and upset. When I shouted ouch she let go, backed off and looked shocked herself.
Should I be worried?