Save for monkeys (using sticks for termites) and such, I can't think of a tool using carnivore outside of pack mechanics like Orca and Wolves.
All corvid species (Ravens, Crows) use simple tools in the wild and are omnivores.
Eagles are known to drop flightless prey from 30m or so to end it with minimum risk to the eagle. I've seen it done with squirrels and have seen the after effects of a cat. (3 eagles feasting on the splattered pet's body). It's well documented with fish, weakly so for small dogs and pet cats, but in Eagle River, AK, where a 2 mile drive will allow one to see a dozen eagles or more, they are dense enough to be looking for easy prey, and small domestic pets outdoors are on the menu. I've seen eagles dive after pekineese, toy poodles, dachshunds, domestic cats. Fortunately, eagles have a 10% success rate... They're obligate carnivores.
Cats and dogs have been known to work door knobs to get access to things, and even to shove containers over in order to access the contents. Cats are obligate carnivores, and dogs meat-requiring omnivores.
Racoons perform food preparation... omnivores, and able to open most human containers.
Octopi use found objects, some even toting them along for use in other locations. If they ever get past the suicide motherhood, we had better watch out. They are exclusive carnivores, as far as has been documented. They routinely solve physical puzzles that chimps cannot.
Note that chimps use tools for hunting. They make simple spears for hunting certain small species, typically by stabbing into the nesting holes. They use grass to predate on termites and ants. A few have been seen using clubs in dominance displays, which implies use in interpersonal violence. We know they can and will use a variety human tools when in captivity, but almost exclusively food motivated. They are ommnivores.
Orang Utan, however, imitate tool use
without food rewards. They aren't as social as chimps, tho'. They are largely herbivorous omnivores.
