Reply #62: Taco Bell and KFC chicken meat factories are known to be abusive to the chickens.

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Their chickens live in squalid conditions. Instead of improving the living conditions for the birds, which would reduce the level of filth and disease, the chickens are instead pumped full of antibiotics. Their top beaks are cut off, so they won't fight eachother (if you lived in super-cramped conditions, wouldn't you want to fight, too?)
This is as good a reason as any to not support KFC or Taco Bell.

Here is just one of many articles. http://badgerherald.com/news/2007/10/18/peta_protests_kfc_ch.php