Pine shavings.

[pitoon]

I have several friends who use kiln dried pine under their rats.
Every single rat they own sneezes.....

as someone already mentioned....it could have been a number of things to set the sneezing off....dusty shavings, a sick rat, bad food, dirty tub.....to many variables.

one thing that many people get confused is cedar and pine..... two different trees....two different shavings. and one of the worst shavings to get is the "aroma" type such as lemon scent.

just my opinions of course...

Pitoon