1. Guinea pigs were originally bred as food- I'm not kidding about this.
2. They are incredibly stupid; they just sit and stare or hurt themselves. Dogs are 1,000,000,000 x smarter.
3. Incredibly brittle and injury prone; they hurt their backs and break their ankles on exercise wheels, and make you by a crapload of weird supplies for them. You can let dogs walk around free, but you constantly have to make sure these fucking rats don't kill themselves.
4. They are not cute; they are big beady-eyed rats. Rodents aren't pets, they're VERMIN.
The fact that there are great dogs on the street, and one of these fuckers has a home makes me SICK.
My friend's stupid guinea pig died when it fell off it's bowl- good riddace.