Hey everyone, I decided to bring up this old post because I just read my HRS newsletter, and here is some updated information about cardboard and Newspaper.
source: Article from rabbit.org monthly newsletter.
"Is it safe for my rabbit to chew newspaper and cardboard?
Will the paper and ink poison him?" Deb Jacobson of the
Printers’ National Environmental Assistance Center
(http://www.pneac.org) responds: The formulations for
inks were modified MANY years ago to reduce or
eliminate pigments that contain heavy metals (particularly
lead). Cardboard is typically printed with water-based
flexographic inks and the adhesives used to make the
cardboard are water and corn starch based. Basically
you could ingest it for extra roughage if you so choose
(as do the bunnies).
The newsprint is typically printed with oil-based offset inks
(most common) or water-based flexographic inks and low
grade paper. The paper grade used for newspapers is a
good thing because they have used less bleaching chemicals
and less processing to make the paper. The same is true
for the corrugated.
I would suggest you withhold the slick paper, multi-color
ads. The newsprint with black ink or newsprint with a few
pages of colored ink is fine. One reason is the paper they
use may be a higher grade (more bleaching chemicals
used). The other reason is the pigments in the colored
inks. Some pigments still contain "compounds" of
chemicals that I would not want my "baby" to consume.
I figured this what just a "good to know" thing.