This does not work for me. (If it ever can work, it does require a s/s Rat, or at least the p/s Rat. Must be faster than Pilfer, p/p doesn't cut it.) Multiple tries, mostly around when to bring back the Rat. Jar of smelly liquid means refuge won't work, and trying to bring rat in after jar is thrown on the Quilen, means it still won't work. Cannon is hitting that rat on the second refresh, no matter what. Hatchling dies too early, or the Quilen does, and Rat is needed to finish.
I didn't have the rat so I followed Cymre's guide using Hare, Perky Pug and Darkmoon Hatchling:
https://www.youtube.com/watch?v=9YkGFAFn0PU I watched it and wrote down the turns because the second canon used on your rabbit (and when it is used) is important. Got it the first time I actually wrote stuff down :)
And that's provided he dropped well below 420 health to compensate with the gain in HP due to Pilfer being a humanoid, otherwise Predatory strike won't do anything and you'll have to finish with the rat.
The first time I tried, my DMH got below 50% on the same round I was going to use predatory strike, so Pilfer went in first, healed up above 25% so predatory strike didn't kill him. I lost that fight because of a few lucky crits on my DMH, but I tried again and it went perfectly.
Managed to do this with :
Dust Bunny(2.1.2), Darkmoon Hatchling(2.x.1), Frostfur Rat(1,x,2). All pets above 263 speed.
2)Swap and cast Trample 4 times, Darkmoon Hatchling left with little hp and debuff.
3)Swap to Dust Bunny and cast Smoke Bomb
4)Stampede, bunny dies from antaen cannon.
5)Use Darkmoon Hatchling and cast Trample 2 times
6)Cast Flock, hatchling dies
7)Use Frostfur Rat and cast Call Darkness(if it doesnt kill finish with Sneak Attack)