I was commenting on ickyness as a moral factor. One's comfort with a certain food source should not determine the morality of utilizing it.How come? Wouldn't an animals intellect mean varying degrees of suffering in the same conditions? Or do you think only physical suffering exists in non-human animals?
Suffering -- physical or psychic -- is a different factor. I'm sure a flatworm experiences less anxiety or fear than a cow, and I'm pretty sure it would be easier to conceal a cow's eventual fate from it than a human. I also think most of our customary food animals are quite capable of both fear and anxiety, as well as pain.
These are factors to consider.