Hello Cat, how are the girls settling in? Their sister did very well at the hamster show last weekend
These shavings are made from softwood so should be okay - Sitka Spruce is the main softwood component in shavings in the UK normally which is one of the reasons we can use shavings here wheras our members in USA need to be a lot more careful as their shavings are normally hardwood based such as Pine and Cedar.