I thought of another one. Deadly Eyes. It's not really monsters but rats mutated to be small dog size by eating grain that has steroids in it. I still remember the part in the film where the baby's high chair had been knocked over and there was a trail of blood on the floor from where it was being dragged off. Very unsettling.
Hahaha! That brings back memories. The upgraded version of
The Killer Shrews! I have that one, in one of those big, ugly VHS cases that take up twice as much room as they should. Keep thinking about reviewing it, because so few movies feature a pack of dashhounds wearing rat costumes.
EDIT: Fixed the URL to "The Killer Shrews"