Forgive me since my knowledge on this subject is basically simplified high school science (didnt take biology at A-level) including me reading around out of curiosity (genetics fascinates me) I can only see short term gains, by cloning your livestock you are assuming they are the best they can ever be, which if you do have a really good bull is great short term for meat production but if you keep re-using this copy the DNA essentially is removed from the genepool and will not advance. Long term this could cause real problems. If all your bulls across the country are the same then they may all carry an identical genetic weakness to a certain disease and as a result may all die big problem. with a large genepool there is lower chance of one single disease killing all the bulls in the country. That's assuming a whole country was to run of one single copy of DNA which frankly would be silly. My point is that if you displace natural livestock with a select group of clones your potentially endangering the future of your livestock. This is talking large scale cloning. This ceases to be an issue on an independent scale but I can't really see such a massive advantage over selective breeding when used on a small scale anyway.
Its not that I think cloning is a bad idea per say, I just think replicating one livestock for the sake of slightly better meat is a bit more trouble than its worth, particularly on a a large scale.
