Ok, I saw the last 15 minutes of this on late night tv a while back.
It looked like some late 70’s disaster flick in the vein of the killer bee movies or other nature runs amok movies.
This one had dogs running amok. The end I saw was a pack of about 20 common house dogs, some of them quite small, rampaging on a college campus and I’m not sure if it was a commentary on the sad state of higher education but these dogs managed to take out about 100 college kids in the library.
The film ended with some sort of radio announcement about how ‘cosmic rays’ or something like that had affected dogs everywhere but it was over now, just as the camera dramatically zooms in a kitten who then makes a menacing face.
Any idea?