Getting a bit OT, but it's been brought up, so I'll add to it here.
Re crossbreds. A crossbred is not a crossbred. Like I said before, not all non-purebred dogs have hybrid vigour. You get hybrid vigour with decently crossed dogs, not really with oopsies. I had an alsatian x lab who was just awesome and lived till 17. My own dog might live a while longer, but with a lot of help. Even the 'designer crosses' end up surrendered or moved on - I personally know of loads who are privately rehomed.
Can we just get it straight that there was really only one instance of the OP being berated? No need to ruin a great thread by harping on one person who has now unsubscribed.
If you haven't experienced daily life in a shelter, then you are severely underestimating the rate of dog abandonment (won't get started on cats). I'm talking dogs of all breeding - pure and crossbred. I can't be alarmist enough, because it is a big hidden problem. I wonder if the first owners, or even the owners of the mothers of my dogs have any clue as to where their dogs have ended up. I've had two dogs (still have one, the other was tragically killed by a car when my dad was walking him off lead in an unguarded moment he'll regret forever and never do again unless in a designated area) - beautiful, great looking dogs with fantastic little temperaments - who had been through two 'loving' (and incompetent) homes before getting to us. They go nowhere from here. The second homes they came from were very nice people you would never suspect of making a dumb dog-decision...yet, they did. One was a nice educated family, the other a nice old lady. You just never know by looking at or even talking to people.
THAT'S why the shelters and pounds are full. Some pound dogs even come with papers
There is a reason that there is a growing movement to make desexing compulsory for dog welfare. There really are enough dogs around without adding to the pool of dogs, young and old, who already need loving homes, who will be desexed, vaccinated, health and temperament tested, and come with health guarantees.