I bought my dog out in the country and met her parents while buying her, when I brought her home... she was afraid of noise and people that came in contact with her. She has broken away from being scared and is now very aggressive. She is now 7 months old. I decided that when she got about 4 months to build a dog house and put her outside because she was too big for my small house. I feed her and give her clean water everyday. I don't walk her as much as I used to due to the new addition to my family. When I come close to feed her or anything else... she grips my arm with her teeth, literally my whole arm in her mouth... she doesn't bit down hard but she scares me a little. She has always been full of energy.. When I let her go... she constantly jumps all over me and she stays behind me a lot.. I don't hit her or anything but when she gets behind me, she jumps up and nip at me and I get nervous about that. Her tails wags when all of this is going on... the pupil in her eyes looks fully dialated... Can someone tell me what maybe happening or going on... I'm a little scared and need help...

I would suggest that you speak to your vet and get the names of good trainers in your area. You have created this situation by not training your dog and keeping her isolated outside. She will only get worse if you don't start a training routine which includes a lot of socialization. I don't know if the aggression is completely reversible at this age but it can be managed and handled. Dogs are pack animals. Meaning they are social animals. If you look at wolves & coyotes in the wild, they have a pack rank, with the leader of the pack correcting behavioral issues. Domesticated dogs need to be treated in the same way. They need constant interaction with people and other animals with the benefit of positive reinforcement training to create a mentally well balanced and trained dog. If you don't have the time and money to dedicate to training her properly, I would suggest that you consider surrendering her to a lab rescue group in your area who can work with her. If that is what you decide to do, here is a link to help you get started: Labrador Retriever Rescue and Adoption- Adopt a Labrador Retriever Near You

Please listen to RubyPitbull. I could have helped you get the dog off to a better start if it wasn't too late when you got her. Early socilization is very important, and if neglected, difficult to fix. Real experts know what they can't do over the net.