I apologize for the off topic, but I could not let this stand without replying. I do animal rescue, so keep that in mind.
I have worked in medical and pharmaceutical research for 30 years. Years ago, i did use rodents in my research, but haven't used animals of any sort for many, many years now. Although working with animal saddens me, I can say that the standards at two universities, one medical college, and three pharmaceutical companies i have worked for, have all forbidden use of any type of animal other than intentionally bred by liiscened companies for the explicit use in medical research. First of all it is not good science to use variable animals that have questionable backgrounds. Lab animals, including dogs, are bred and kept in a controlled environment so that they are as much the same as they can be, and then sold to the research institution in a highly regulated fashion. Second, there is a Federal standard and rules I think called IUACUC that prohibits buying unlicensed animals. Third, no one I know would touch an animal if there was ANY evidence that it was previously someone's pet.
I live with three dogs, I have owned four previously that all died from old age. I am a dog lover to the extreme, and yes it hurts my soul to hear the howling And catch a glimpse on occasion (beagles are very common, labs and large breeds, not so much). But really what kills me are the primates. On the other hand, I did work on one of the best HIV medicines that saved many, many lives, some, people I know. The drugs would not, could not, have been developed without some amount of research in primates. Animal research is very, very expensive, and despite what you hear, companies and universities do as little of it as possible and avoid it as much as possible.