These mobs are targets in the 10th anniversary quest "Culling Fever - Bertoxxulous' Favor", they are stationary and do not die or attack after you cast the potion on them:
a floppy icefall hare: -2039, 1151, 43
a keen driftwolf: -2012, 513, 1 (there is an adolecent driftwolf standing right next to this one who will attack once uninvised)