Simply put, the suffering that these poor animals endure makes me sick.

More than 250,000,000 animals are killed in Canada's labs every year, with an average of one dying every sixteen seconds.1 They are primates, mice, rats, fish, birds, and even domestic dogs and cats. There is indeed a market for former pets in vivisection. Some are collected by “bunchers”, who steal dogs and cats from backyards or elsewhere. Other pets are picked up at animal shelters – a perfectly legal practice known as "pound seizure."

http://liberationbc.org/issues/animal_testing