It's been a while since I swung into this part of the Badmovies.Org forum, but you will be glad I did lovely_julie. That scene is from "GNAW: Food of the Gods II!" Besides the doctor having a meltdown, there are giant rats aplenty, and a giant toddler with a foul mouth and a bad attitude. LOL!
Here is the
IMDB page.
Here is a
Reader Review from this very site!
Here is a quote from the review about the unlucky doctor you are talking about:
Edmund - A wonderfully maniacal scientist. He's bent on finding a cure for baldness. Sadly, he turns into a puddle of dog cancer.