But in a nutshell, lots of phase I drug toxicology studies use friendly breeds, like beagles for drug or other medical studies because they are so good natured. jerks (callled 'bunchers') typically do the rounds on craigslist, pounds, etc., and gather animals to sell to labs. Labs turn a blind eye (or maybe not so) as to the source. These animals endure a lot of unnecessary suffering, most of this research is already well known and not necessary. Blame FDA, and folks that have no problem gathering up animals for these purposes.