They are seperate issues.
She nips and bites owners and visitors when we try to leave the house or hug each other any time.
She is allowed on furniture only when we say she can.
No obedience training-not great with other dogs but knows many commands which she follows, but she ignores any commands when we leave the house.
She has bit/nipped when shut in a separate room when the door goes, and often when my 16 year old daughter tries to stop her getting out of the front door after i leave the house- i ignore her. Bites any time somebody picks up a handbag or puts shoes/cardigan on.
To discipline Bella, we reward positive behaviour and we ignore negative behaviour, sometimes shut the door on her when she barks so she stops instantly.
Bella is a Sprollie- Springer x Collie and has been spayed.