http://www.cbc.ca/canada/saskatchewan/story/2007/03/02/feed-quarantine.html
Commentary:
So my question is: if these farmers suffer some sort of loss through this inexcusable lapse of quality control by the feed mill, either because the farmers in question cannot sell their stock, or because the stock has to be destroyed, do the victims in this case have to grind through possibly years of court time for recompense?
Note: http://www.cbc.ca/canad...

Our cattle never had a single drop of artificial feed, they eat only grass and hay, but have become equally worthless during the BSE hysteria and we're still paying for the loans we had to take out to feed them.
With cattle prices at the rock bottom, on account of the conspiracy of the multinational mafia, to force farmers off the land, farmers are desperate to put a few pounds onto the animals to stave off bankruptcy and are going for this kind of junk foods, plus other chemicals with disastrous consqences to themselves and the public who have to eat that unhealthy meat, with kids ballooning up like pigs.
But then, this is "free enterprise market economy" nobody's supposed to question without being called a commie pinko socialist leftie.
Ed Deak.
Even after discussing this with Agriculture-Alberta, I have yet to find any significant difference between the infectious agents of any of these animals (and those of the human form - Creutzfeldt-Jakob disease.)
Also consider that rendering-produced protein is cheaper than plant-derived protein. Cash-strapped producers would be better off giving pig-feed to cows than cow-feed.
The infectious agent, a prion, is a chain of amino acids. The functional characteristics of the assembled protein result from: 1) the characteristics of the amino acids (hydrophobicity) and 2) the bond angles of the amino acids.
One can interchange two different amino acids having similar qualities, without changing protein function - but can truthfully claim that they are not the same protein.
After discussing this with Agriculture Alberta, I could still find no significant difference between the various animal prions.
Likely the most common effect of prion infection is Alzheimers. One NY study found that some 25% of Alzheimers cases were really the prion based Creutzfeldt-Jakob disease.
Recall that Scrapie is a common prion disease.