I've laughed so hard at this thread 
I can still vividly remember in my late teens, standing in the sunshine chatting to a new friend and her mum at my front gate, trying desperately to overcome my shyness and be cool and grown up. A car was coming down the road, and as it drew closer the accompanying freakish noise and ungodly smell became stronger. We stopped talking and all turned to look...
It was my parents and sister, returning from a park with our two labs. They burst out the car, sister half laughing/half panicking, parents yelling at me to open the back door, grab the doggy towels and get the dogs in the garden. The noise had been a combination of the dogs hacking and howling and crashing around in the car exploding D&V from both ends, and the horrified shouts of the human passengers as they raced to get all of them out of the confined space.
The smell was a mixture of violent doggy sick, violent doggy poo, stagnant pond water and days old curry (both undigested and stuck to the outside of the dogs, or partially digested, stuck to the dog and the inside of the car). They had disappeared into the trees, and were found several minutes later with their heads in a big black sack which had been dumped there who knows when, eating the bright yellow slop as fast as they could (which for a labrador, is pretty fast). They had already thrown themselves into a disgusting pond and tanked up on the water before being dragged out, so the lab-time-bomb was set.
The car door was opened and my friend and her mum stood well back as two lunatic dogs, covered in horrifc substances and barking away to make sure not a single neighbour missed the spectacle, bounded towards the garden where I was brandishing bonios to ensure they didn't fancy a detour round the house, stopping only to be sick by the gate.
After shutting the dogs outside, I went back round the front and said goodbye to my friend and her mum, neither of whom mentioned the spectacle still playing out in the wrecked car in front of them but left pretty quickly.
The shame. Criiiiiiinge. And Ewwww!
I have my own house now and a child. I don't have a dog. Whenever I think I would like one, I remember this story, or one of the many other (although less dramatic) stories I have to tell about this mad pair of hounds, and think again .