dog biting

[jools414]

Hello all.
i have a 4 year old springer spaniel, Molly,who is completely mad, a female.
she has a habit of biting, that is when you try to take something from her, she releases it, and then will snap and bite your hand really hard. She has drawn blood on a number of occasions, mainly to me. Last night she decided to bite my son in the same way. He was really angry as i was looking after his three children, and said he does not want the dog near his children. This i can understand and fully appreciate his concerns. Now i need to find a way to solve this problem, or else the dog will have to go. Molly barks and jumps up at everyone who comes to the door in a quite aggressive way, and i am finding it extremely stressful trying to control her. I have tried to train her, and she will obey some commands and on occassions is really quite obedient. I have now downloaded all the info on your website so am hoping that this will solve the problems. If anyone has any advice i would really appreciate it. Jools414