That link was a bit of a beat up. Animals do have rights, not to be tortued or mistreated.
I have a right to order a thick juicy steak be it Beef, Kangaroo or Crocodile (Emu's not that great).
I think I've eaten may way through the evolutionary chart except monkeys, cats and dogs, I may have eaten a rat I'm not sure, I have eaten at my fair share of Kebab shops.
My point is that no-one has the right to be cruel to an animal, and cows raised to be my dinner have a right to comfortable life and a quick death from a clean kill.
I buy free-range, non-battery-farm eggs and grain fed beef/lamb/pork from reputable breeders, some of whom I now know. Farmers are good people.
Jeez I was going to go on about milk and cheese, prawns etcetera but my point is that we meat eaters know that cruelty to animals is wrong and bad, even us Godless ones know that.
EDIT: left out an important 'not'