Pine and Cedar have more in common than rat breeders want to face.
All soft woods have phenols. Phenols are what give the wood it's sickly sweet smell. It's acidic, caustic and is very detrimental to any animal that breathes the fumes.
In any animal exposed to those phenols in pine and cedar, they will have elevated enzyme levels in the liver. It causes liver disease, kidney disease, cancer in the lungs, respiratory disease and leaves the door open for Myco flare ups which will ultimately kill your animal from respiratory distress and suppressed immune system.
Why doesn't any feeder breeder see these effects? How many breeders actually let their animals cycle breed and witness the 2-3 years of life? Just the shortness of life that most feeder breeders witness is testament about why they refuse to believe how poisonous pine is.
Dustiness is the least of your problems when your dealing with these soft wood shavings.
I will only ever used the Equine fresh pellets. It's a pellet that's been made in a process that effectively removes most of the harmful oils, tars, and acids. A little goes a very long way.
1 40 lb bag of pellets cost around 5-6$, and I can get 2 weeks of changes for 30 rats. It loosely comes to around 12$ a month for me, and it does a much better job in absorption, dust, and most importantly, SMELL.
Just my .02 cents
AFRMA- Softwood bedding