http://en.wikipedia.org/wiki/Environmental_impact_of_meat_pr...
Animals that evolved to eat grains, such as chickens, convert calories much more efficiently.
Unless the cost of beef can be adjusted to include all the negative externalities that its production entails (topsoil loss, water and air pollution from fertilizers, pesticides, manure, and diesel fuel, antibiotic resistant super-bugs, public health threats from unsanitary slaughterhouse practices, etc) then meat producers and consumers will benefit from cheaper prices while the environment suffers.
Only if you consider the truth ridiculous. It's simple biological physics. There are inefficiencies in energy transfer.
Btw, 60% of the Amazon deforestation is caused by cattle ranching.
http://www.ted.com/talks/allan_savory_how_to_green_the_world...
Though on the hunting angle, deer would probably be the largest animal you can hunt, then there'd be goats, wild pigs and of course rabbits and possums which you can eat (our possums are different from North American ones).
Edit: also just thought I'd throw in I've got nothing against Canada, you guys and the US, are to us, like we are to Australia (if that makes sense)