* Summary of toxicology
1. Effects on Animals: No information was available on the health effects of western red cedar dust on experimental animals.
2. Effects on Humans: Exposure to western red cedar dust can result in the development of rhinitis, dermatitis, and asthma [ACGIH 1991]...
I have used both and seen no problems but very few of my birds are over 3 years old so developing respiratory problems in birds older than 3 or for that matter at any age would be really hard to convince me that cedar shavings is the cause.. I have heard that cedar is bad on BYC but do not...