They're still around. I killed a few about a month back. Stick a green thorn in a field (best if it's fenced in, otherwise the little turd will get away and never come back), and after a few seconds one will pop up and start running around and taking shots at you. I let my tamer deal with them. I have my pets guard me, then plant a thorn. The bunny will usually hit me first, then my pets pounce on him. According to UO guide, they're suppose to drop colored eggs, but the last ones I killed didn't have a single egg on them. (maybe they changed that?) Loot isn't bad, but far from great. If you're bored and want to farm with a tamer it could be worth it. For a melee char it might be a different story. The effort kinda out weighs the reward IMO.