1/3000 drop is only 63.2% likely after 3000 kills
This is probably obvious to some. Idk why, but I always wrongfully thought the probability was accumulating I.e near 100% after 3000. To get 99% chance, you'd have to get 13,813 drops.
This has greatly unmotivated me for going for any more pets after getting kbd at 42 kills lol