Alternative to wood shavings

[desnap]

I was just ay the vet with my guinea pig, and they said her lungs and throat were too loud, and it was probably because of the woodshavings. What is an alternative. (Also i can faintly hear her raspy breathing, poor girl )

 

[Piggies&buns]

the link below gives a good list of alternatives
Bedding For Guinea Pigs - Overview