|Large cat that resides close to the gate leading to the Great Grey Wolf Sif. Mid-fight, two more cats will join in. They do not respawn.
Crest of Artorias door and then get up on the top of the cliff overlooking where the cats reside. One cat should be visible in the distance. Shooting the cat with a bow will cause it to start rolling and charge into the cliff below you, where it will stun itself and then slowly walk backwards while facing you. As it walks backwards, you will have time for a number of bleeding headshots, spells, or firebombs, after which it will start rolling again and continue to repeat the pattern. Eventually all three cats can be lured into this repeating pattern. This approach will require a fairly large number of arrows or bombs, although bombs can be very effective since it is possible to hit 2-3 cats at the same time if you time it right. Bring at least several hundred arrows as you may need to repeatedly incite them into ramming the cliff below you.
Dung Pies at them. Stay in the safe zone by the trees and lure out one at a time, make them do their rolling attack, then dodge and lock on. Throw 3 Dung pies in a row, this should be enough to infect them, and you should also be unharmed from the Toxin with some basic armor. Once infected, the cat will die in about 3 minutes (NG). Rinse and repeat for the other two.
Possibly weak to lightning or thrust damage, as the Lightning Spear destroyed them. They are also very vulnerable to ranged attacks as they back away from the forest. Fire definitely hurts them.