Woof!

Dogs can be frightening. I'm not talking about the big, angry dogs that charge a person, snarling and barking, only to be brought up short at the massive chain welded around their massive necks. I'm talking about all dogs at different times.
The big dogs can be intimidating when they get all angry, sure, but that is to be expected. What's really unsettling is when they watch a person walking by. They don't snarl, bare their teeth, bark, or anything like that - they just watch. They don't blink, they don't get angry, they just watch. It's the confidence they exude, a confidence that comes from knowing that they are able to destroy whoever they are looking at whenever they want. It's unsettling.
But the little dogs can be unnerving as well. They realise that they aren't imposing physically. But between yapping incessantly and generally acting as dumb as doorknobs, they have pauses. Pauses where they watch what's going on, perhaps with a little too much intensity. They are plotting something. I think that they know their limitations when alone, but have determined the value of working together. They know that if they can unite enough of them, they will be a force to be reckoned with. Can you imagine a pack of small dogs rolling down the street? It would be like a plague of locusts, leaving nothing but twitching dry bones in their wake. And dogs eat, or at least chew on, anything they can fit in their mouths, so you know nothing is safe.
And to top it off, if the small dogs make their bid to take over the word first, the big dogs are going to play along. Eventually there will be a clash between the two factions for final supremecy of the planet, but by then the time of humanity will already have long been at an end.
And that will be too bad, because it's going to be some sort of battle worth seeing.