none of mine ever did. it depends on how well trained they are
I was home schooled & my animals always ate the homework I did after the teachers left! Of course I had to " redo it" for the first time! lol
Rats certainly would.
I have had several pets. I have had fish, hamsters, gerbils, frogs, dogs, and cats. I had one cat that did. I printed out a paper that I had to turn in for a college class and set it on the table to get ready for class. I come back to pack my bag and caught the cat chewing on my paper. I went to class, showed my paper to the professor and asked if I could go make another copy. He looked at it and asked what happened and I told him my cat ate it. True story. Happened 4 yrs ago.