Maybe we ought to kill the humans who steal cattle from ranchers since 21,000 cattle were lost to theft in 2005. Domestic dogs killed 21,900 head of cattle. Predator-related causes of death to cattle totaled 190,000 last year. Of that number, 4,400 have been attributed to the wolf.
Non-predator related deaths totaled 3,861,000. And if we total all of this up? In 2005, 4,051,000 head of cattle were lost to all causes, with only 4,400 due to the ever picked on and misunderstood wolf.
Cattle rustlers were not so long ago hung by their necks until they were dead, not such a bad idea IMO.
I will have to assume the nearly 4 million head of cattle you cite were killed and butchered for us humans to eat. I'm not sure how that factors in, but if the Wolves had not been reintroduced then ranchers would have had ~4400 more head of cattle to do with as they pleased.
I think the # for Wolves will continue to rise as they expand the size of their range, and evetually the # for dogs will fall as they are driven out or killed by the Wolves.