She goes into what we call ugly spells. When she is tired or just gets carried away. Once she takes a good nap she is like a different dog. She bites hard. How do you make her understand that she is drawing blood. We have tried the vinegar and water to spray her with, the can with the screws inside and now have went to an air horn. Everything seems to work for a day or two and then she starts barking at the object and jumping and biting at it. We tried playing with toys, but she focuses on your arm or hand instead of the toy. We are now trying grabbing her by the neck and shaking her. She throws herself on the ground and as soon as you let her go she comes right back at you jumping and biting again and if she gets hold she draws blood or at the least leaves very deep teeth marks. She is not agressive when she is eating or drinking. Rides in the car like a champ and listens well. She knows what down and no means, but when she gets ugly she is impossible. I don't want a mean dog. We are trying to socialize her and although she is frightened we are making progress. If this is playing she doesn't know when playing is hurting. We have a three year old in the house now and we have to be very careful with the dog around her because of the jumping and biting. Any help would be greatly appreciated.

Ken Figeroa asked the same question in the basic obedience forum, I think he recieved excellent advice. you ought to give it a read. Yoshikowa and Mincher I think gave the best advice

http://leerburg.server294.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=15;t=000229

Thanks so much Dennis, we will try this.