buncher
n.— «Many of the animals in such ads end up with hoarders and puppy mills, used as bait for training fighting dogs, or “adopted” by “bunchers.” A “buncher” is someone who collects animals to sell to research facilities.» —“Watch out! Your ‘free’ puppy could go to a lab” by Karlina Beisel Free Lance-Star (Fredericksburg, Va.) Jan. 26, 2006. (source: Double-Tongued Dictionary)