There is something immensely satisfying in taking in a rescue dog, in many cases someone else has either been unable to handle or it became a burden or a nuisance, it amazes me that people take on dogs almost as a fashion accessory and discard it when it is either no longer cool or convenient.
The decision to take on a dog should never ever be taken lightly the whole family must buy into the idea or the problems it can cause can be terminal for a relationship that may already be creaking.
It has been known for people to simply buy dogs because lots of their friends have them and they don't want to look out of place in public. Generally speaking, dogs in this situation are not treated well at all and will suffer at the hands of their 'owners' behind closed doors. The dog is not actually wanted, but is used a show for those whom treat their dogs well and look after them.
Dogs can be incredibly perceptive they can suffer from loneliness, anxiety, stress depression, and often grieve for lost pals and owners. Sometimes they give up the will to live and die from their grief. The owners do, not always reciprocate this total and utter loyalty, they sometimes take on dogs without thinking through just what a commitment long term dog ownership really is.