Well, to be sure it would probably bankrupt Canada to have a large enough standing military to be able to truly defend our borders and coastline if we had to. Still, it has been allowed to decline greatly in the last few decades. The good news is that the Canadian public has started to understand just how woefull our military is for the roles that we have in mind for, how outdated much of their equipment is. Similarly, the Liberal government under the new PM Paul Martin is making noises that indicate it also understands the need for renewal of the Canadian armed forces.
We would act, but they might have to take a number if we were already involved elsewhere. But, I guess they are used to waiting.
Yes, we'll act by sending some “inspectors” into Canada for 12 years, longer if needed, and give them the benefit of our criticism advise.
But, Canada won't need our help, their allies, France and Germany, will rush in to defend Canada.