I find cruelty to animals abhorrent, as would many people. Unfortunately, it is all too common in the practices to produce meat as 'efficiently' and as cheaply as as possible so they can be sold at low prices to consumers.
This PeTA video is very disturbing, though it is nearly two years old now
Many people now buy free range eggs and free range chickens. Perhaps one day, meat at the supermarket could be labelled as "cruelty free" and certified as such, in much the same way that tinned tuna is labelled "dolphin safe".