Warning: Some footage in this report will be upsetting to some viewers
KFC refuses to say if it will sign up to the "Better Chicken Commitment" its competitor Domino's Pizza has adopted, which promises a switch from fast growing "frankenchickens" to slower growing breeds.
This comes as disturbing footage captured by an animal rights group and supplied to RNZ shows fast-growing chickens struggling to walk, and reach food or water.
Here's Farah Hancock with the story.