Back in the 70's I worked as a lab tech in the biology dept at the Univ of DE. I witnessed cats being used in experiments - what they were doing I don't know and didn't ask - but they had electrodes implanted in the top of their heads - and after the "experiments" were complete - the aimals were destroyed. It made me sick!!! - and fortunately I did not work in the division with the people that were conducting these experiments. I just avoided that section of the building like the plague!