Developed at the University of Guelph, in Guelph, Ontario Canada.
"...is a trademark used to designate a genetically modified line of Yorkshire pigs that produces phytase in the salivary glands (parotid, submaxillary and sublingual), and secretes the enzyme in the saliva... Since the Enviropig™ is able to digest cereal grain phosphorus there is no need to supplement the diet with either mineral phosphate or commercially produced phytase, and there is less phosphorus in the manure."
They claims that the Enviropig has two benefits:
1) it reduces feed cost
2) reduces the potential of water pollution
Read more about the Enviropig's...
Here is an article about the Enviropig in
“Genetically engineered meat close to your table” November 22 2008, Toronto Star
Cathy Holtslander, community organizer with Saskatchewan-based Beyond Factory Farming, says "The model of high-intensity large-scale hog production hasn't worked even from the point of view of profitability and survival of the hog industry. So it's a failed model, and introducing a genetically modified pig to a failed model is not going to be beneficial, it's not going to solve that problem, and I really wonder about the impact.”