It's generally not a major concern if your chinchilla nibbles on a small amount of wood shavings occasionally. However, if this becomes a regular habit, it could potentially harm their health, so it's best to discourage this behavior.

Why Chinchillas Might Eat Wood Shavings
Chinchillas, being rodents, have a natural inclination to chew and gnaw. Their primary diet should consist of high-quality chinchilla pellets, along with Timothy hay or alfalfa hay. Chewing on cage components like platforms or even wood shavings is not unusual. They also enjoy chewing on applewood sticks. Often, they nibble on wood shavings out of boredom, so there’s usually no immediate cause for alarm.
The Risks of Eating Wood Shavings
While a small amount of wood shavings may not cause immediate harm, it’s important to understand that wood shavings are primarily processed wood with little nutritional value. Furthermore, wood shavings are often treated with bleaching agents during processing, which may be detrimental to your chinchilla's health. They should never be considered a primary food source. Consistent ingestion of wood shavings can lead to digestive issues or even impaction.
Safe Alternatives for Chinchilla Chewing
Instead of wood shavings, offer your chinchilla safe alternatives that satisfy their chewing needs, promote dental health, and provide proper nutrition. Applewood sticks are an excellent choice for safe chewing and provide dental benefits. Additionally, a chinchilla’s primary diet should be focused on a high-quality chinchilla pellet food, complemented with Timothy hay or alfalfa hay. Timothy hay, like the grass often found by roadsides, is a good, cost-effective option and is loved by many small animals. Alfalfa hay is also beneficial and commonly used in animal husbandry and is a favorite for rabbits. These should be readily available to them at all times. The focus should always be to offer a safe and healthy diet that satisfies their nutritional needs and helps with natural chewing instincts.