Such a sweet idea, orca
. My point was that an epidemiological survey is not scientifically robust enough to establish more than a correlation, which is not proof of anything, and that the problems associated with 'life-style' choices, especially with regard to food, are complex. I do not know how such a 'link' as has been mooted could be scientifically established, but I do know it hasn't been established yet.
Are you saying that dogs were forced to smoke tobacco in order to establish the lung cancer link? If so, I'm sorry to hear it.
nightowl, I suppose perceptions of PC-ness are always going to be rather subjective from whatever angle one looks at the subject in question. For me the important thing is that we have choices.
With regard to food choices and other life style choices we make, I sometimes think we try too hard to eliminate all risk, or what is seen as risk. It's a luxury to be able to do that.