Not by Dragon.
Jonathan Frisby dies before the events of the book "Mrs. Frisby and the Rats of NIMH" take place. His death is mentioned early on in the story, and it serves as the motivation for the main character, Mrs. Frisby, to seek help from the rats of NIMH.
they all die
they all die
he does not die in the end the rats oh nimh move their house just in time
no
No, Justin does not die in "Mrs. Frisby and the Rats of NIMH." He plays a prominent role in helping Mrs. Frisby and the rats of NIMH in their escape and survival efforts.
Jonathan narrowly escapes death during the escape from NIMH by chewing through the straps that are holding him down, allowing him to break free just in time. This quick thinking and resourcefulness enable him to avoid being killed during their escape.
Dumb heads, cat dragon ate him. Blah, I'm 3 and I know it, retard
no
Dragon is the Fitzgibbon's fierce cat who despises other animals and would die to eat one of the rats. The book mentions that Dragon somehow killed Mr. Jonathan Frisby but it doesn't tell how.
the answer is not specified, but most readers think that he did die unfortunately
He was killed by the cat Dragon while trying to put a sleeping drug in Dragon's food dish for the Rats of NIMH.