In the 'perfect' wilderness - interesting.
Yes, in the perfect wilderness where there are no humans, ie: Spatzizi park in Northern BC, where we see nature take it's place.

It did that with the wolves and caribou in the early to mid 70's.

Caribou numbers were high, and the 'recovering' wolf populations from the 1950's poison-off all over the Province had been increasing in numbers normally over the previous 20 years until they hit critical mass.

All the bitches came into heat and all hell broke loose with an extremely rapid increase in wolf in numbers.

Lots of feed for a year of so, until about 1977 through 1978 the caribou (and moose and goats were reduced to tens from thousands. now, short of food, instead of dying off as nature protests happens, the bloody wolves moved South down the Skeena and Kispiox drainages, killing off the moose, caribou and goats as they roamed South looking for food. The hit the Bulkely Valley and spread to Houston to the East and Terrace to the West, all the time increasing numbers rapidly and feeding now on cattle and horses along with the ungulates. They are in wolf heaven now, with ranchers to support the dwindling deer and moose numbers.

The spreading you see of them in the States is quite similar to what happened here - isn't it! The only way the blighters were stopped, was with another poisoning program, light one, but effective and strategic and performed by citizens as the game branch & government was tied up by greenpiece, the Sierra Club and the Telkwa Foundation - all tree huggers and --sholes.

Now, about 20 years later, the wolves are again a problem here - maybe Australia needs some (they'd kill off the dingos pretty quickly and rid the country of pesky 'roos') sheep - all, they won't go after sheep - will they? How about England? Califonia? Oh, they'll hit California in about 4 to 5 years, I'd guess if something isn't done.