my lovely Border collie woke me in the night - just for a snuggle.
when I got up this morning, she was clearly not herself and was losing a little blood at the back end, but due in season next week so not too concerned.
then realised she was clearly starting to feel worse, and could detecta faint smell, quite unpleasant.
rang vets, they said bring her straight in - cue emergency op (speying)
they said had I not noticed, or maybe gone out for the day she could have died within hours 
thankfully she is home now, though very groggy, but will be fine in a couple of weeks 
my pocket might take longer to recover though 
basically i just think more people should be aware of this horrible illness, and unless you are planning to breed, perhaps consider speying when young to prevent this.
I really had no idea!