Can anyone give me some information please.
I have a 14 month doberman male. He is a great dog but there are a
number of issues which i find strange regarding his behaviour.

Firstly he does not bark when someone rings the door bell. He never
shows aggression towards other aggressive dogs and if I am out a long
walk with him and I feel threatened by someone he does not indicate to
me he can protect me. He seems to not have any ability to bark without
command or growl.
I do not feel safe with the dog as I think he will not protect me if
attack occurs etc.

Pleasegivemesome information about this. It will be greatly appreciated

Robbie