With so many dogs becoming unwanted pets and ending up, through no fault of their own, in rescue centres please consider taking one (or more) on, if you are thinking of adding to your family with a pet dog.

Rescue dogs can be challenging when you first bring them home but if you are calm, assertive and consistent with your dog, resisting the urge to ‘baby’ him, then you should be reward with a wonderful family pet. 

A dog expects to work for his food and water, and to follow the rules and guidelines of an orderly pack, controlled by a trusted pack leader. Therefore, when your dog comes to live with you he is naturally looking for a calm assertive leader. When these qualities are not demonstrated by you (his owner and pack leader) he can very quickly assume the role of pack leader and display unwanted and/or dominant behaviour. If not addressed and dealt with this dominant behaviour could lead to aggression.

Remember it is not the dog’s fault if they do not understand you! You must communicate in their language.

http://www.telegraph.co.uk/family/pets/8287949/Woman-returned-rescue-dog-because-it-clashed-with-curtains.html