Hello all I'm looking for a little help I have two staffordshire bull terrier 1 is 2 and the other is 3 years old last night I woke up to my 2 year old on top of my 3 year old biting her neck behind the ear. I jumped up and told her to drop and that was the end of it but the damage had been done the bite was a in and out not a grab and Shake. I feel asleep on the sofa 2 year old behind me and the 3 year old at my feet. What I have seen though the day after a walk the dogs laying down and rest when the 3 year old sleeps she simulates running in her sleep and vocal noses when this happens my 2 year old stands over her growling at her I am now scared to leave them together alown in the same part of the house so I have to split them up into different parts of the house. When she shows this behaviour when I'm awake I correct her strate away with a NO and she stops strate away but if I'm fast asleep this is hard to do as by the time I hear her she is on the 3 year olds neck the damage is done ( back of the ear not throat ) I've been trying to work out what is going on but I'm at a loss any help would be greatly appreciated .