I think sometimes due to genetic problems, but mostly, as I remember from biology, cloning is a special way of extremely controlled-by-human breeding.
Actually technically cloning is just the producing of an exact copy of oneself. So your cells clone everyday. And plants and stuff.
Artificial cloning is the same thing it's just that there's a human doing it, fertilizing an egg with the same DNA and stuffs.
Honestly there is no difference between a cloned cow and a regular cow. If the DNA is taken like rite at birth and stuff, because the DNA in the cloned cow will be as old at conception as it was (meaning damage and stuff to it) when it was taken. So this constant aging of DNA could lead to Genetic deformities and we would need to be careful to keep regularly breeding cows though, because if we have to continue to take constantly aging DNA that increases the chance for genetic deformities.
Not that most deformities would actually effect the consumer.
But I doubt that anyone would be dumb enough to allow cloning to go on without a control.
What I think people's problem with cloning animals is that they are afraid of genetically altered clones. Because as we all know tampering with genetics is not a refined science as of yet (I think, but I'm probably wrong, as long as you know what the genomes do).
This is all a product of hippies, ignorance, and the media. And people with organic cow fetish.
Nobody quote this post and say
Irony because I will murdalize you.